11 entries under lunatic topic. ×

12
mental(adjective, insane, hacked, psychiatric)
11
deranged(adjective, crazy, mad, insane, irrational)
9
of unsound mind(expression, adjective, idiom, insane, sane)
7
brainsick(adjective, crazy, sick, insane, sane)
2
mad as a hatter(adjective, idiom, crazy, sick, insane)
1
schizzo(crazy, insane, irrational, distracted, hacked)
1
whacko(crazy, mad, insane, irrational, distracted)
0
aper(crazy, irrational, distracted, hacked)
0
nutsy(mad, insane, hacked, psychiatric)
0
nutty as fruitcake(expression, sick, hacked, crackbrained)
0
psychiatric(mad, insane, hacked, crackbrained)
11 years ago|10k views|share |citing 
APASmart Define. (2015). loco thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/loco/thesaurus/synonyms
ChicagoSmart Define. 2015. "loco thesaurus" https://smartdefine.org/loco/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, loco thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/loco/thesaurus/synonyms>.
MLASmart Define. "loco thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/loco/thesaurus/synonyms>