80 entries under foolish topic. ×

25
crazy(adjective, informal, wild, strange)
19
mad(adjective, silly, crazy, insane)
19
loony(adjective, informal, silly, crazy)
18
insane(adjective, silly, crazy, mad)
16
barmy(adjective, silly, crazy, mad)
15
balmy(adjective, silly, crazy, mad)
15
unbalanced(adjective, silly, crazy, mad)
14
lunatic(adjective, informal, silly, crazy)
13
screwy(adjective, slang, silly, crazy)
12
cuckoo(adjective, slang, silly, crazy)
12
demented(adjective, silly, crazy, mad)
12
deranged(adjective, simple, silly, crazy)
12
wacky(adjective, slang, silly, crazy)
11
cracked(adjective, informal, silly, crazy)
11
kooky(adjective, silly, crazy, mad)
11
touched(adjective, silly, crazy, mad)
10
fruity(adjective, slang, informal, silly)
10
mental(adjective, simple, silly, mad)
9
round the bend(expression, adjective, idiom, silly)
7
crazed(adjective, wild, silly, crazy)
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APASmart Define. (2015). bonkers thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/bonkers/thesaurus/synonyms
ChicagoSmart Define. 2015. "bonkers thesaurus" https://smartdefine.org/bonkers/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, bonkers thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/bonkers/thesaurus/synonyms>.
MLASmart Define. "bonkers thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/bonkers/thesaurus/synonyms>