9 entries under informal topic. ×

25
crazy(adjective, wild, strange, foolish)
19
loony(adjective, silly, foolish, crazy)
14
lunatic(adjective, silly, foolish, crazy)
11
cracked(adjective, silly, foolish, crazy)
11
daffy(adjective, slang, crazy, mad)
10
fruity(adjective, slang, silly, foolish)
9
haywire(adjective, crazy, broken)
8
gaga(adjective, crazy, sane)
7
brainsick(adjective, insane, sane)
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APASmart Define. (2015). bonkers thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/bonkers/thesaurus/synonyms
ChicagoSmart Define. 2015. "bonkers thesaurus" https://smartdefine.org/bonkers/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, bonkers thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/bonkers/thesaurus/synonyms>.
MLASmart Define. "bonkers thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/bonkers/thesaurus/synonyms>