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Synonyms for rat

noun

  1. A rodent

    mouse, muskrat, vermin; see pest 1, rodent.

    Varieties of rats include: white, black, brown, house, laboratory, longtailed, water, swamp, desert, marsh, tree, giant, field, bamboo, cotton, kangaroo, jerboa, river, pack, big-eared, short-eared, red-nosed.

  2. *A deserter or betrayer

    informer, turncoat, fink*; see deserter, traitor.

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

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