(Includes bodies of water.) You may be after a full glossary of landforms, in which case the Wikipedia article is comprehensive: Full list of landforms at Wikipedia. This post skews literary.
Arroyo — (colloquial: southwestern United States) The channel of a flat-floored, ephemeral
stream, commonly with very steep to vertical banks cut in unconsolidated material;
sometimes called a wash. It is usually dry but can be transformed into a temporary
watercourse or short-lived torrent after heavy rain within the watershed. Where arroyos
intersect zones of ground-water discharge, they are more properly classed as intermittent
Ash field — A land area covered by a relatively thick or distinctive, surficial deposit of
volcanic ash (air fall) that can be traced to a specific source and has well defined boundaries. An ash field can be distinguished from adjacent landforms or land areas based on ash thickness, mineral composition, and physical characteristics. Soils within an ash field form solely or predominantly within the ash deposit.
Aspect — The direction toward which a slope faces with respect to the compass or to the
rays of the Sun; also called slope aspect.
Atoll — A coral reef appearing in plan view as roughly circular, and surmounted by a chain
of closely spaced, low coral islets that encircle or nearly encircle a shallow lagoon in which
there is no land or islands of non-coral origin; the reef is surrounded by open sea.
Backshore — The upper or inner, usually dry, zone of the shore or beach, lying between the
high-water line of mean spring tides and the upper limit of shore-zone processes; it is acted
upon by waves or covered by water only during exceptionally severe storms or unusually
high tides. It is essentially horizontal or slopes gently landward, and is divided from the
foreshore by the crest of the most seaward berm.
Backslope — The hillslope profile position that forms the steepest and generally linear,
middle portion of the slope. In profile, backslopes are commonly bounded by a convex
shoulder above and a concave footslope below. They may or may not include cliff segments
(i.e., free faces). Backslopes are commonly erosional forms produced by mass movement,
colluvial action, and running water. Compare – summit, shoulder, footslope, toeslope.
Backswamp — A flood-plain landform. Extensive, marshy or swampy, depressed areas of
flood plains between natural levees and valley sides or terraces. Compare – valley flat
Badlands — A landscape that is intricately dissected and characterized by a very fine
drainage network with high drainage densities and short, steep slopes with narrow interfluves. Badlands develop on surfaces with little or no vegetative cover, overlying unconsolidated or poorly cemented materials.
Bay — a recessed, coastal body of water that directly connects to a larger main body of water, such as an ocean, a lake, or another bay. A large bay is usually called a gulf, sea, sound, or bight. A fjord is a particularly steep bay shaped by glacial activity. See: At The Bay by Katherine Mansfield.
Beck — (Northern English) a stream
Berm — Berms are mounded hills of soil that are often constructed to serve a purpose in a landscaped area. They can be used for aesthetics, excess rainwater drainage, separating different areas of the garden, accent walkways, and as foundations for privacy screens.
Boreen — (Irish) a narrow country road
Bower — a pleasant shady place under trees or climbing plants in a garden or wood
Buffalo wallow — A buffalo wallow or bison wallow is a natural topographical depression in the flat prairie land that holds rain water and runoff. Originally this would have served as a temporary watering hole for wildlife, including the American bison.
Canal — an artificial waterway constructed to allow the passage of boats or ships inland or to convey water for irrigation.
Canyon — A deep cleft (gorge), between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. Typically a canyon has a river flowing through it. See “The Outcasts of Poker Flat” and “The People Across The Canyon” for two short stories in which the canyon comes to the fore.
Cliff — a vertical, or nearly vertical, rock exposure. Cliffs are formed as erosion landforms by the processes of weathering and erosion. Cliffs are common on coasts, in mountainous areas, escarpments and along rivers. Cliffs are usually formed by rock that is resistant to weathering and erosion. Sedimentary rocks most likely to form cliffs include sandstone, limestone, chalk, and dolomite. Igneous rocks such as granite and basalt also often form cliffs.
Col — the lowest point on a mountain ridge between two peaks (of hills rather than mountains). A drainage divide.
Colonnade — a row or evenly spaced trees
Conurbation — a city surrounded by many urban areas
Coteau — uplands; higher ground of a region
Coulée — a steep and dry gully
Couloir — gully
Counterscarp — narrow earth band on the outer wall of a defensive ditch
Cove — a small type of bay or coastal inlet. Coves usually have narrow, restricted entrances, are often circular or oval, and are often situated within a larger bay. Think cove, think ‘sheltered’.
Crest — the top of a mountain or hill. Also used as a verb e.g. ‘Crest the rise’. This word is used to mean the hillslope component summit, but geologists don’t approve of that usage. When geologists say ‘crest’ they specifically mean the narrow top of a ridge, hill or mountain.
Crevasse — A wide breach or crack in the bank of a river or canal. A crevasse can naturally occur or it can be created artificially (e.g. in the bank of the lower Mississippi River.) Also refers to a wide, deep break or fissure in the earth that appears after an earthquake. When talking about glaciers, a crevasse is a deep, nearly vertical fissure, crack or break in the mass of land ice.
Crista — ridge or fold resembling a crest
Cutbank — In everyday usage cutbank refers to a small cliff on an otherwise flattish surface which will injure you or your horse if you don’t see it, but probably isn’t big enough to kill you outright. Larry McMurtry frequently makes use of this word in his cowboy novels. Geologists don’t use cutbank to mean this. In geology, a cutbank is a slope or wall portion of a cut excavated into unconsolidated material or bedrock, as in a borrow pit.
Dale — “up hill and down dale”. A dale is a valley, especially in northern England (e.g. The Yorkshire Dales.) A valley can feel closed in, but a dale is a wide, open area that stretches between hills. (Dale comes from the Old English word for “valley,” dæl.)
Debris — Any surficial accumulation of loose material detached from rock masses by
chemical and mechanical means, as by decay and disintegration. It consists of rock clastic
material of any size and sometimes organic matter.
Delta — A body of alluvium, nearly flat and fan-shaped, deposited at or near the mouth of a
river or stream where it enters a body of relatively quiet water, usually a sea or lake.
Delta plain — The level or nearly level surface composing the land-ward part of a large
delta; strictly, a flood plain characterized by repeated channel bifurcation and divergence,
multiple distributary channels, and interdistributary flood basins.
Deposit — Either consolidated or unconsolidated material of any type that has accumulated by natural processes or by human activity.
Depression — Any relatively sunken part of the earth’s surface; especially a low-lying area
surrounded by higher ground. A closed depression has no natural outlet for surface drainage (e.g., a sinkhole). An open depression has a natural outlet for surface drainage. You can get closed depressions and open depressions.
Desert pavement — A natural, residual concentration or layer of wind-polished, closely
packed gravel, boulders, and other rock fragments, mantling a desert surface. It is formed
where wind action and sheetwash have removed all smaller particles or where rock fragments have migrated upward through sediments to the surface. It usually protects the underlying, finer-grained material from further deflation.
Detritus — A collective term for rock and mineral fragments occurring in sediments, that are detached or removed by mechanical means (e.g., disintegration, abrasion) and derived from preexisting rocks and moved from their place of origin.
Dell — a small valley, usually among trees. ‘There’s a sort of dell down here in front of us, where the ground seems all hilly and humpy and hummocky.’ (The Wind In The Willows)
Dike — A tabular igneous intrusion that cuts across the bedding or foliation of the country rock. Cf. sill.
Dip — A geomorphic component (characteristic piece) of flat plains (e.g. lake
plain, low coastal plain, low-relief till plain) consisting of a shallow and typically closed
depression that tends to be an area of focused groundwater recharge but not a permanent
water body and that lies slightly lower and is wetter than the adjacent talf (flat part), and favors the accumulation of fine sediments and organic materials.
Dip slope — A slope of the land surface, roughly determined by and approximately
conforming to the dip of underlying bedded rocks; (i.e., the long, gently inclined surface of a
cuesta). Cf. scarp slope.
Ditch — a landform created by running water. Smaller than a gully, which is smaller than a ravine.
Draw — (US). a terrain feature formed by two parallel ridges or spurs with low ground in between them. The area of low ground itself is the draw, and it is defined by the spurs surrounding it. Draws are similar to valleys on a smaller scale; however, while valleys are by nature parallel to a ridgeline, a draw is perpendicular to the ridge, and rises with the surrounding ground, disappearing up-slope. A draw is usually etched in a hillside by water flow, is usually dry, but many contain an ephemeral stream or loose rocks from eroded rockfall. A draw may be described as ‘deep’ or ‘shallow’.
Embankment — ‘a railway embankment’ (the little hill which elevates a railway line)
Escarpment — a long, steep slope, especially one at the edge of a plateau or separating areas of land at different heights. Commonly formed by faulting or fracturing of the earth’s crust. (Compare scarp)
Flat —An area of low level ground, especially near water. e.g. “the shingle flats of the lake”
Freshet — the flood of a river from heavy rain or melted snow
Fold — sheep walked up the lane and into the fold
Gap — a low point or opening between hills or mountains or in a ridge or mountain range. It may be called a col, notch, pass, saddle, water gap, or wind gap, and geomorphologically are most often carved by water erosion from a freshet, stream or a river.
Gulch — a narrow and steep-sided ravine marking the course of a fast stream. ‘…two men who were then hanging from the boughs of a sycamore in the gulch…’ (“The Outcasts of Poker Flat”)
Gully — a landform created by running water, eroding sharply into soil, typically on a hillside. Gullies resemble large ditches or small valleys, but are metres to tens of metres in depth and width.
Heath — (British) an area of open uncultivated land, typically on acid sandy soil, with characteristic vegetation of heather, gorse, and coarse grasses.
Hill — A hill is a landform that extends above the surrounding terrain. It often has a distinct summit.
Hollow — Another name for a valley. In literature, functions similarly to words like ‘gap’, symbolically/metaphorically suggesting an absence of something. See: Wolf Hollow by Lauren Wolk. A very small dale (a British term) is sometimes called a “hollow,” pronounced “holler” in American rural Appalachia.
Hummock — a hump or ridge in an ice field. (US) a piece of forested ground rising above a marsh.
Isthmus — a narrow strip of land with sea on either side, forming a link between two larger areas of land.
Jungle — An area of land overgrown with dense forest and tangled vegetation, typically in the tropics. See: The Storybook Jungle for visual representations of jungles as they tend to appear in storybooks. Jungles are best suited to tree-dwelling apes, because food is found high off the ground (compared to the savanna).
Knob — a prominent round hill.
Lagoon — a stretch of salt water separated from the sea by a low sandbank or coral reef. In mythology and storytelling, lagoons tend to be associated with mermaids.
Moor — a tract of open uncultivated upland, typically covered with heather. Think Wuthering Heights. Mary Lennox’s uncle in The Secret Garden lives in the Yorkshire Moors. The word ‘wutherin’ is used there, too: “Listen to th’ wind wutherin’ round the house”. (Yorkshire dialect.) When trees are cleared from the uplands, heavy rain washes soil off the hills and into the valleys below, leaving a much reduced mineral fertility and turning the uplands into sodden bleak moors that resist the return of woodland. Moors therefore include the feeling of saudade (something missing, something which was once here but is no longer).
after each breakfast she gazed out of the window across to the huge moor, which seemed to spread out on all sides and climb up to the skyThe Secret Garden, Frances Hodgson Burnett
Mound — a heaped pile of earth, gravel, sand, rocks, or debris. Most commonly, mounds are earthen formations such as hills and mountains, particularly if they appear artificial. A mound may be any rounded area of topographically higher elevation on any surface. Artificial mounds have been created for a variety of reasons throughout history, including ceremonial, burial (tumulus), and commemorative purposes.
Mountain — A mountain is a large landform that rises above the surrounding land in a limited area, usually in the form of a peak. A mountain is generally considered to be steeper than a hill.
Notch — a rugged and forbidding col (for mountains rather than hills)
Outcrop — a rock formation. Somewhere like New Mexico is well-known for rocky outcrops.
Peninsula — a landform surrounded by water on the majority of its border while being connected to a mainland it juts out from. Peninsulas can also be named: a headland, cape, island promontory, bill, point, fork, or spit. A river which courses through a very tight meander is also sometimes said to form a “peninsula” within the loop of water.
Plateau — In geology and physical geography, a plateau, also called a high plain or a tableland, is an area of a highland consisting of flat terrain, that is raised sharply above the surrounding area on at least one side.
Point — a narrow piece of land jutting out into the sea. A point is generally considered a tapering piece of land projecting into a body of water that is less prominent than a cape.
Ravine — a deep, narrow gorge with steep sides
Re-entrant — the international word for a ‘draw’.
Ridge — a geological feature consisting of a chain of mountains or hills that form a continuous elevated crest for some distance. The sides of the ridge slope away from narrow top on either side. Ridges are usually termed hills or mountains as well, depending on size.
Ridge line — The line along the crest formed by the highest points, with the terrain dropping down on either side, is called the ridgeline.
Saddle — the lowest area between two highlands.
Sand berm — In coastal systems, a berm is a raised ridge of pebbles or sand found at high tide or storm tide marks on a beach. In snow removal, a berm or windrow refers to the linear accumulation of snow cast aside by a plow.
Savanna — A wide, open, mostly flat landscape. Of all the geographical arenas, savannas contain the highest amount of protein per square kilometer. We can therefore deduce that this is humans’ natural landscape, where we largely evolved, and where we thrive. (Savannas were where we lived when we became meat eaters.) We find our meat at ground level, unlike in jungles, which are better suited to apes who can swing through the trees. Humans are attracted to the savanna in art, though the ideal ‘savanna’ is undulating, probably because high areas afford us a good vantage point, good for safety and hunting.
Scarp — a very steep bank or slope; an escarpment. “The north face is a very steep scarp.”
Shore/Shoreline — the fringe of land at the edge of a large body of water, such as an ocean, sea, or lake. In physical oceanography, a shore is the wider fringe that is geologically modified by the action of the body of water past and present, while the beach is at the edge of the shore, representing the intertidal zone where there is one. In contrast to a coast, a shore can border any body of water, while the coast must border an ocean; in that sense a coast is a type of shore; however, coast often refers to an area far wider than the shore, often stretching miles into the interior.
Sinkhole — A sinkhole, also known as a cenote, sink, sink-hole, swallet, swallow hole, or doline (the different terms for sinkholes are often used interchangeably), is a depression or hole in the ground caused by some form of collapse of the surface layer.
Spur — A spur is a lateral ridge or tongue of land descending from a hill, mountain or main crest of a ridge.
Tarn — A mountain pool that forms in a hollow scooped out by a glacier is called a tarn. Officially, tarns are smaller than lakes. The word tarn comes from the Old Norse tjörn, “small mountain lake with no tributaries.”
Turlough — (in Ireland) a low-lying area on limestone which becomes flooded in wet weather through the welling up of groundwater from the rock
Valley — a low area between hills or mountains typically with a river running through it. In geology, a valley or dale is a depression that is longer than it is wide. The terms U-shaped and V-shaped are descriptive terms of geography to characterize the form of valleys. Most valleys belong to one of these two main types or a mixture of them, at least with respect to the cross section of the slopes or hillsides.
Volcano — a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
Wind gap — another name for a notch
Header painting: Chalk Paths by Eric Revilious, 1935