| Main Entry: | |
| Part of Speech: | noun |
| Definition: | physical foundation |
| Synonyms: | base, bed, bottom, foot, footing, ground, groundwork, rest, resting place, seat, substructure, support |
| Main Entry: | backbone |
| Part of Speech: | noun |
| Definition: | spinal column of vertebrate |
| Synonyms: | base, basis, foundation, spine, support, vertebrae, vertebral column |
| Main Entry: | base |
| Part of Speech: | noun |
| Definition: | foundation |
| Synonyms: | basement, basis, bed, bedrock, bottom, foot, footing, ground, groundwork, infrastructure, pedestal, rest, root, seat, seating, stand, substratum, substructure, support, underpinning |
| Antonyms: | top |
| Main Entry: | base |
| Part of Speech: | noun |
| Definition: | fundamental part |
| Synonyms: | authority, backbone, basis, chief constituent, core, essence, essential, evidence, foundation, fundamental, groundwork, heart, important part, infrastructure, key, origin, primary element, principal, principle, root, source, underpinning |
| Main Entry: | bed |
| Part of Speech: | noun |
| Definition: | base, foundation |
| Synonyms: | basis, bedrock, bottom, ground, groundwork, rest, seat, substratum, understructure |
| Main Entry: | beginning |
| Part of Speech: | noun |
| Definition: | start of an event or action |
| Synonyms: | alpha, basis, birth, blastoff, commencement, creation, dawn, dawning, day one, genesis, inauguration, inception, induction, infancy, initiation, installation, introduction, kickoff, onset, opener, opening, origin, origination, outset, point of departure, preface, prelude, presentation, rise, root, rudiment, source, spring, square one, starting point, takeoff, threshold, top |
| Antonyms: | completion, conclusion, consummation, end, ending, finish, goal, termination |
| Main Entry: | body |
| Part of Speech: | noun |
| Definition: | bulk; central portion |
| Synonyms: | assembly, basis, bed, box, chassis, core, corpus, crux, essence, frame, fuselage, gist, gravamen, groundwork, hull, main part, majority, mass, material, matter, pith, skeleton, staple, substance, substructure, sum, tenor, total, trunk, whole |
| Antonyms: | nothing, nothingness |
| 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: | bottom |
| Part of Speech: | noun |
| Definition: | base, core |
| Synonyms: | basis, bottom line, cause, essence, essentiality, ground, heart, mainspring, marrow, origin, pith, principle, quintessence, root, soul, source, stuff, substance, virtuality |
| Antonyms: | exteriority, outside |