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Synonyms for bottom

noun

  1. The lowest part

    underside, nether portion, base, nadir, foot, pediment, depths, bed, floor, lowest part, deepest part, sole, ground, underpart.

    Antonyms top*, peak, pinnacle.

  2. The foundation

    base, substructure, support; see foundation 2.

  3. The source

    cause, basis, origin, root; see origin 2, 3.

  4. *The buttocks

    behind, seat, rear; see back 2, rump.

at bottom
be at the bottom of

originate, be the reason for, activate, be responsible for; see cause 2.

bet one's bottom dollar*

bet everything one has, be certain, be assured; see bet, trust 1.

See bottom in Webster's New World Roget's A-Z Thesaurus II

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