10
wacky(adjective, weak, simple, wrong, knowledge)
9
bizarre(adjective, wrong, happy, perfect, unusual)
9
immoderate(adjective, severe, harsh, offensive, exceptional)
9
inordinate(adjective, severe, harsh, offensive, exceptional)
9
monstrous(adjective, extreme, immoral, shocking, ridiculous)
8
cockeyed(adjective, knowledge, ability, informal, silly)
8
droll(adjective, unusual, strange, silly, fantastic)
8
farfetched(adjective, hard, difficult, false, unbelievable)
8
funny(adjective, silly, absurd, pitiful, pathetic)
8
incongruous(adjective, wrong, false, foolish, stupid)
8
weird(adjective, unusual, strange, silly, foolish)
7
comical(adjective, strange, funny, ridiculous, absurd)
7
daft(adjective, weak, simple, wild, silly)
7
derisory(adjective, silly, foolish, fantastic, absurd)
7
grotesque(adjective, ugly, ridiculous, misshapen)
7
harebrained(adjective, weak, great, simple, knowledge)
7
inconceivable(adjective, obscure, unreasonable, useless, absurd)
6
balmy(adjective, knowledge, slang, ability, wild)
6
dippy(adjective, weak, knowledge, slang, ability)
6
dotty(adjective, weak, simple, silly, foolish)
11 years ago|25k views|share |citing 
APASmart Define. (2015). preposterous thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/preposterous/thesaurus/synonyms
ChicagoSmart Define. 2015. "preposterous thesaurus" https://smartdefine.org/preposterous/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, preposterous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/preposterous/thesaurus/synonyms>.
MLASmart Define. "preposterous thesaurus" 2 September 2015. Web. 20 September 2026. <https://smartdefine.org/preposterous/thesaurus/synonyms>