3
improper(adjective, suitable, unsuitable, unfitting, intolerable)
3
imprudent(adjective, weak, simple, wrong, severe)
3
inflated(adjective, false, extravagant, ridiculous, excessive)
3
invalid(adjective, foolish, unreasonable, absurd, irrational)
3
jerky(adjective, weak, simple, knowledge, slang)
3
offbeat(adjective, happy, perfect, fantastic, extravagant)
3
out of bounds(expression, adjective, idiom, usual, shocking)
3
out of sight(expression, adjective, idiom, strange, crazy)
3
overwrought(false, extravagant, exaggeration, inflated, embellished)
3
prohibitive(adjective, restrictive)
3
queer(adjective, unusual, strange, funny, doubtful)
3
quixotic(adjective, happy, silly, foolish, fantastic)
3
reckless(adjective, careless, wild, silly, foolish)
3
screwball(adjective, silly, foolish, unwise)
3
too much(expression, adjective, informal, false, unreasonable)
3
uncalled-for(adjective, wrong, false, awkward, excessive)
3
unearthly(adjective, knowledge, ability)
3
unrestrained(adjective, rough, foolish, crazy, unreasonable)
3
unusual(adjective, ridiculous, bizarre)
3
unwise(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>