127 entries under silly topic. ×

14
kooky(adjective, weak, simple, wrong, wild)
13
cracked(adjective, informal, wild, foolish)
12
fatuous(adjective, weak, simple, wild, strange)
12
idiotic(adjective, weak, simple, knowledge, ability)
12
preposterous(adjective, weak, simple, wrong, knowledge)
12
unbalanced(adjective, foolish, crazy, sane)
11
daffy(adjective, weak, simple, pleasant, happy)
11
moronic(adjective, weak, simple, knowledge, ability)
10
crazed(adjective, wild, foolish, stupid)
10
maniacal(adjective, foolish, stupid, crazy)
10
touched(adjective, wrong, informal, wild)
9
asinine(adjective, weak, simple, careless)
9
buggy(adjective, slang, foolish, crazy)
9
fruity(adjective, slang, foolish, insane)
9
harebrained(adjective, weak, simple, knowledge, ability)
9
imbecilic(adjective, weak, simple, knowledge, ability)
9
potty(adjective, wild, foolish, stupid)
9
stupid(adjective, weak, simple, wrong, careless)
9
zany(adjective, weak, simple, knowledge, ability)
8
bedlamite(noun, adjective, person, keen, warm)
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APASmart Define. (2015). loony thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/loony/thesaurus/synonyms
ChicagoSmart Define. 2015. "loony thesaurus" https://smartdefine.org/loony/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, loony thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/loony/thesaurus/synonyms>.
MLASmart Define. "loony thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/loony/thesaurus/synonyms>