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Preposterous has 139 synonyms. The top synonyms for preposterous are absurd, ridiculous, outrageous, incredible, inconceivable, unreasonable, unimaginable, grotesque and 131 more. Another word for preposterous is absurd. Browse the full list below.
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| Random | DefinitionA common synonym for preposterous is absurd. Other synonyms include ridiculous, outrageous, incredible, inconceivable.
Preposterous has 139 synonyms listed on Thesaurasize.
(adj): absurd, or contrary to common sense
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