5
bonkers(adjective, crazy, sane, cuckoo, queer)
5
cracked(adjective, sane)
5
crazed
5
out to lunch(expression, adjective, idiom, crazy, unstable)
5
psycho(noun, slang, sick, mad person)
4
brainsick(adjective, crazy, sick, insane, sane)
4
nutty(adjective, crazy, unstable, disturbed, sane)
3
crackers(adjective, crazy, sick, sane, off)
3
distraught(adjective, crazy, sick, sane)
3
irrational(adjective, unstable, disturbed, unhinged)
3
moonstruck(adjective, insane, sane)
3
off(adjective, sane, dotty)
3
screwy(adjective, sane)
3
unsound(adjective, crazy, unstable, sick, disturbed)
2
abnormal
2
bananas(adjective, sane)
2
barmy
2
certifiable
2
flighty(crazy, cuckoo, queer)
2
fruity(adjective, insane, sane)
11 years ago|2k views|share |citing 
APASmart Define. (2015). not all there thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/not_all_there/thesaurus/synonyms
ChicagoSmart Define. 2015. "not all there thesaurus" https://smartdefine.org/not_all_there/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, not all there thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/not_all_there/thesaurus/synonyms>.
MLASmart Define. "not all there thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/not_all_there/thesaurus/synonyms>