53 entries under foolish topic. ×

15
loony(adjective, knowledge, ability, informal)
12
mad(adjective, knowledge, ability, crazy)
11
crazy(adjective, knowledge, ability, informal)
11
daft(adjective, crazy, mad, odd)
11
kooky
11
nutty
11
wacky(adjective, knowledge, slang, ability, informal)
10
dotty
10
insane(adjective, knowledge, ability)
9
lunatic(adjective, knowledge, ability, crazy)
7
absurd(adjective, knowledge, ability, crazy)
5
nonsensical(adjective, knowledge, ability, crazy)
5
silly(adjective, knowledge, ability)
4
daffy
4
harebrained(adjective, knowledge, ability)
4
idiotic(adjective, knowledge, ability)
4
preposterous(adjective, knowledge, ability)
4
senseless(adjective, crazy, mad, odd)
4
zany(adjective, knowledge, ability, informal)
3
dippy(adjective, knowledge, slang, ability)
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APASmart Define. (2015). loopy thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/loopy/thesaurus/synonyms
ChicagoSmart Define. 2015. "loopy thesaurus" https://smartdefine.org/loopy/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, loopy thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/loopy/thesaurus/synonyms>.
MLASmart Define. "loopy thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/loopy/thesaurus/synonyms>