| Main Entry: | |
| Part of Speech: | noun |
| Definition: | room on lower floor of building |
| Synonyms: | bottom, cellar, crypt, excavation, furnace room, storage, substructure, subterranean room, underbuilding, understructure, vault |
| Notes: | a cellar is a storage place, usually underground, for foodstuffs etc; basement is the lowest story of a building, part or wholly below ground level |
| Antonyms: | attic |
| Main Entry: | bottom |
| Part of Speech: | adjective |
| Definition: | lowest; fundamental |
| Synonyms: | basal, base, basement, basic, foundational, ground, last, lowermost, lowest, meat-and-potatoes, nethermost, primary, radical, rock-bottom, underlying, undermost |
| Antonyms: | highest, top, unnecessary |
| Main Entry: | bottom |
| Part of Speech: | noun |
| Definition: | foundation |
| Synonyms: | base, basement, basis, bed, bedrock, belly, deepest part, depths, floor, foot, footing, ground, groundwork, lowest part, nadir, nether portion, pedestal, pediment, rest, seat, sole, substratum, substructure, support, terra firma, underbelly, underneath, underside |
| Antonyms: | top |
| Main Entry: | cellar |
| Part of Speech: | noun |
| Definition: | underground story of building |
| Synonyms: | apartment, basement, subbasement, subterrane, underground room, vault |
| Notes: | a cellar is a storage place, usually underground, for foodstuffs etc; basement is the lowest story of a building, part or wholly below ground level |
| Antonyms: | attic |
| Main Entry: | floor |
| Part of Speech: | noun |
| Definition: | bottom of a room; level of a multistory building |
| Synonyms: | basement, boards, canvas, carpet, cellar, deck, downstairs, flat, flooring, ground, landing, lowest point, mat, mezzanine, nadir, rug, stage, story, tier, upstairs |
| Antonyms: | ceiling |
| Main Entry: | footing |
| Part of Speech: | noun |
| Definition: | foundation, basis |
| Synonyms: | basement, bedrock, bottom, establishment, foot, foothold, ground, groundwork, infrastructure, installation, resting place, seat, seating, settlement, substratum, substructure, underpinning, understructure, warrant |
| Main Entry: | seat |
| Part of Speech: | noun |
| Definition: | base, foundation |
| Synonyms: | basement, basis, bed, bottom, cause, fitting, footing, ground, groundwork, rest, seating, support |
| Main Entry: | vault |
| Part of Speech: | noun |
| Definition: | depository |
| Synonyms: | basement, box, can, catacomb, cavern, cellar, crib*, crypt, dungeon, grave, mausoleum, pit, repository, safe, safe-deposit box, sepulcher, strong room, tomb |
| Main Entry: | recreation room |
| Part of Speech: | noun |
| Definition: | play room |
| Synonyms: | basement, family room, game room, playroom, pool room, rec room, rumpus room |