15
loony(adjective, knowledge, ability, informal, foolish)
12
barmy(adjective, crazy, mad, odd, insane)
12
bonkers
12
mad(adjective, knowledge, ability, foolish, crazy)
12
nuts
11
balmy(adjective, knowledge, slang, ability, crazy)
11
crazy(adjective, knowledge, ability, informal, foolish)
11
daft(adjective, foolish, crazy, mad, odd)
11
kooky(adjective, foolish)
11
loco
11
nutty(adjective, foolish)
11
wacky(adjective, knowledge, slang, ability, informal)
10
batty
10
dotty(adjective, foolish)
10
insane(adjective, knowledge, ability, foolish)
9
fruity
9
haywire
9
lunatic(adjective, knowledge, ability, foolish, crazy)
8
bats
8
buggy
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APASmart Define. (2015). loopy thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/loopy/thesaurus/synonyms
ChicagoSmart Define. 2015. "loopy thesaurus" https://smartdefine.org/loopy/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, loopy thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/loopy/thesaurus/synonyms>.
MLASmart Define. "loopy thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/loopy/thesaurus/synonyms>