23 entries under loony topic. ×

10
crazy(noun, adjective, fanatic, dingbat)
4
nut(noun, crazy, fanatic, patient, cuckoo)
3
crackpot(noun, character, crazy, eccentric)
3
madman(noun, character, dissentient, neurotic)
3
maniac(noun, crazy, cuckoo, lunatic)
3
screwball(noun, crazy, cuckoo, lunatic)
2
fanatic(noun, crazy, dingbat, ultraist)
2
lunatic(noun, crazy, cuckoo, neurotic)
1
bedlamite(noun, character, crazy, eccentric, fanatic)
1
crank(noun, crazy)
1
harebrain(noun, crazy, nut, fanatic)
1
madwoman(noun, character, fanatic, neurotic)
1
nutcase(noun, character, patient, cuckoo)
1
raver(noun, character, patient, cuckoo)
0
bigot(noun, crazy)
0
cuckoo(noun, patient)
0
eccentric(noun, character, crazy, dissentient)
0
fiend(noun, crazy)
0
freak(noun, crazy)
0
non compos mentis(noun, expression, idiom, crazy, nut)
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APASmart Define. (2015). dement thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/dement/thesaurus/synonyms
ChicagoSmart Define. 2015. "dement thesaurus" https://smartdefine.org/dement/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, dement thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/dement/thesaurus/synonyms>.
MLASmart Define. "dement thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/dement/thesaurus/synonyms>