8
quaint(adjective, unusual, wild, strange, usual)
8
round the bend(expression, adjective, idiom, silly, foolish)
8
screwy(adjective, silly, crazy, mad, dubious)
8
singular(adjective, unusual, wild, strange, usual)
7
erratic(adjective, strange, silly, crazy, mad)
7
irrational(adjective, weak, simple, unusual, wild)
7
loco
7
quirky(adjective, unusual, wild, strange, usual)
7
rum(adjective, extraordinary, unusual, strange, usual)
7
screwball(adjective, slang, silly, foolish, crazy)
7
unnatural(adjective, unusual, wild, strange, usual)
7
unusual(adjective, strange, silly, foolish, crazy)
7
zany(adjective, weak, simple, silly, foolish)
6
anomalous(adjective, unusual, wild, strange, crazy)
6
cranky(adjective, usual, eccentric)
6
demented(adjective, wrong, unusual, wild, strange)
6
dippy(adjective, weak, simple, silly, foolish)
6
flaky(adjective, silly, crazy, mad, irregular)
6
offbeat(adjective, unusual, wild, strange, crazy)
6
psychotic(adjective, crazy, mad, unstable, insane)
10 years ago|16k views|share |citing 
APASmart Define. (2016). kooky thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/kooky/thesaurus/synonyms
ChicagoSmart Define. 2016. "kooky thesaurus" https://smartdefine.org/kooky/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, kooky thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/kooky/thesaurus/synonyms>.
MLASmart Define. "kooky thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/kooky/thesaurus/synonyms>