4
futile(adjective, silly, ridiculous, absurd, pointless)
4
incongruous(adjective, silly, stupid, insignificant, unreasonable)
4
irresponsible
4
sappy
4
scatterbrained
4
thoughtless(adjective, silly, foolish, stupid, vulgar)
4
weak-minded
3
addle-pated
3
apish
3
blockheaded(adjective, foolish)
3
cockamamie
3
cockeyed
3
crackpot(adjective, foolish)
3
cretinous(adjective, foolish, senseless)
3
dopey(adjective, foolish)
3
fatuitous
3
half-baked(weak, simple, careless, silly, foolish)
3
idle
3
ignorant(adjective, simple, silly, foolish, stupid)
3
purposeless(adjective, silly, stupid, insignificant, senseless)
11 years ago|18k views|share |citing 
APASmart Define. (2015). asinine thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/asinine/thesaurus/synonyms
ChicagoSmart Define. 2015. "asinine thesaurus" https://smartdefine.org/asinine/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, asinine thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/asinine/thesaurus/synonyms>.
MLASmart Define. "asinine thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/asinine/thesaurus/synonyms>