3
childish
3
cockamamie
3
crackpot(adjective, impractical, half-baked, doomed)
3
curious(adjective, ridiculous)
3
daffy(adjective, weak, simple, strange, foolish)
3
diverting(adjective, light, silly, crazy, funny)
3
entertaining(adjective, light, silly, crazy, funny)
3
improbable
3
invalid(adjective, foolish, fantastic, absurd)
3
irresponsible(adjective, silly, foolish, stupid, fantastic)
3
merry
3
nuts(adjective, silly, foolish, unwise)
3
playful(adjective, amusement)
3
puerile(adjective, dull, silly, foolish, stupid)
3
quizzical(funny, amusing, comic, ridiculousness, farcical)
3
side-splitting(adjective, light, silly, crazy, funny)
3
unintelligent(adjective, dull, weak, simple, silly)
3
unthinkable
3
unwise(adjective, weak, simple, wild, silly)
3
witless(adjective, dull, weak, simple, silly)
11 years ago|15k views|share |citing 
APASmart Define. (2015). ludicrous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ludicrous/thesaurus/synonyms
ChicagoSmart Define. 2015. "ludicrous thesaurus" https://smartdefine.org/ludicrous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, ludicrous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ludicrous/thesaurus/synonyms>.
MLASmart Define. "ludicrous thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/ludicrous/thesaurus/synonyms>