| Main Entry: | estuary |
| Part of Speech: | noun |
| Definition: | mouth |
Synonyms: |
arm, creek, firth, fjord, inlet, tidewater, waterway |
| Main Entry: | arm |
| Part of Speech: | noun |
| Definition: | narrow body of water |
Synonyms: |
branch, brook, channel, creek, estuary, firth, fjord, inlet, rivulet, sound, strait, stream, subdivision, tributary |
| Main Entry: | bay |
| Part of Speech: | noun |
| Definition: | shoreline indentation |
Synonyms: |
anchorage, arm, basin, bayou, bight, cove, estuary, fiord, firth, gulf, harbor, inlet, lagoon, loch, mouth, narrows, sound, strait |
| Main Entry: | canal |
| Part of Speech: | noun |
| Definition: | waterway |
Synonyms: |
aqueduct, bottleneck, channel, choke point, conduit, course, cove, ditch, duct, estuary, firth, trench, water, watercourse |
| Main Entry: | cove |
| Part of Speech: | noun |
| Definition: | inlet, small niche |
Synonyms: |
anchorage, arm, bay, bayou, bight, cave, cavern, creek, estuary, firth, frith, gulf, harbor, hole, lagoon, nook, retreat, slough, sound, wash |
| Main Entry: | inlet |
| Part of Speech: | noun |
| Definition: | arm of the sea |
Synonyms: |
basin, bay, bayou, bight, canal, channel, cove, creek, delta, entrance, estuary, firth, fjord, gulf, harbor, ingress, loch, narrows, passage, slew, slough, sound, strait |
| Main Entry: | marsh |
| Part of Speech: | noun |
| Definition: | swamp |
Synonyms: |
bog, estuary, everglade, fen, mire, morass, moss, quag, quagmire, slough, swampland, wetland |
| Main Entry: | mouth |
| Part of Speech: | noun |
| Definition: | opening |
Synonyms: |
aperture, beak, box, cavity, chops, clam, crevice, delta, door, embouchement, entrance, estuary, firth, fly trap, funnel, gate, gills, gob, harbor, inlet, jaws, kisser, lips, mush, orifice, portal, rim, trap*, yap |
| Main Entry: | river |
| Part of Speech: | noun |
| Definition: | waterway |
Synonyms: |
beck, branch, brook, course, creek, estuary, rill, rivulet, run, runnel, stream, tributary, watercourse |
| Notes: | a stream is smaller than a river, a creek is smaller than a stream but larger than a brook; stream, brook, creek, and rivulet are applied interchangeably to any small river |
| Main Entry: | watercourse |
| Part of Speech: | noun |
| Definition: | waterway |
Synonyms: |
aqueduct, brook, canal, channel, chute, conduit, creek, culvert, drain, estuary, flume, gullet, gully, gutter, inlet, ravine, river, sluice, spillway, stream, trench, wadi |