5
gaga(adjective, irrational)
5
kookie
5
round the bend(expression, adjective, idiom)
4
around the bend(expression, adjective, idiom)
4
cuckoo
4
psychotic
4
screwy
3
bananas
3
clubs(noun, verb)
3
crazed
3
daffy
3
demented
3
goofy
3
insane
3
lunatic
3
mad
3
mental
3
potty
3
unbalanced
3
unhinged
11 years ago|5.1k views|share |citing 
APASmart Define. (2015). bats thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/bats/thesaurus/synonyms
ChicagoSmart Define. 2015. "bats thesaurus" https://smartdefine.org/bats/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, bats thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/bats/thesaurus/synonyms>.
MLASmart Define. "bats thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/bats/thesaurus/synonyms>