60 entries under thoughtless topic. ×

14
lunatic(adjective, characteristic, weak, simple, wild)
13
imbecilic(adjective, characteristic, weak, simple, silly)
13
irrational(adjective, characteristic, weak, simple, wrong)
10
daft(adjective, characteristic, weak, simple, wild)
10
loony(adjective, characteristic, weak, simple, wild)
10
unreasonable(adjective, characteristic, weak, simple, silly)
9
daffy(adjective, characteristic, weak, simple, silly)
8
empty-headed(adjective, characteristic, stupidity, foolishness)
8
illogical(adjective, characteristic, simple, silly, sense)
8
thoughtless(adjective, characteristic, silly, unwise)
8
unwise(adjective, characteristic, weak, simple, wild)
8
dippy(adjective, characteristic, weak, simple, silly)
8
unthinking(adjective, characteristic, stupidity, foolishness)
7
dotty(adjective, characteristic, weak, simple, silly)
6
nutty(adjective, characteristic, weak, simple, wild)
4
simple(adjective, characteristic, weak, silly, foolish)
4
kooky(weak, simple, silly, foolish)
3
wacky(adjective, weak, simple, wild, silly)
3
doltish(adjective, weak, simple, silly, foolish)
3
half-witted(weak, simple, silly, foolish)
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APASmart Define. (2015). fatuous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/fatuous/thesaurus/synonyms
ChicagoSmart Define. 2015. "fatuous thesaurus" https://smartdefine.org/fatuous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, fatuous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fatuous/thesaurus/synonyms>.
MLASmart Define. "fatuous thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/fatuous/thesaurus/synonyms>