5
goofy(adjective, silly, foolish, unwise)
5
half-baked(adjective, silly, foolish, unwise)
5
insane(adjective, silly, foolish, crazy, mad)
5
nonsensical(adjective, silly, foolish, unwise)
5
nut case(noun, expression, idiom)
5
oddity
5
wacky(adjective, silly, foolish, crazy, mad)
5
weirdie(noun, slang, wise)
4
barmy(adjective, silly, foolish, crazy, mad)
4
cranky(adjective, usual)
4
daffy
4
fanatic(noun, person, character, crazy, eccentric)
4
flake(noun, slang, crazy, sick, fanatic)
4
flaky(adjective, silly, foolish, crazy, mad)
4
fool(noun, adjective)
4
gaga
4
idiosyncratic(adjective, usual)
4
nutjob(noun, slang, sick, mad person)
4
potty(adjective, silly, foolish, mad, insane)
4
preposterous(adjective, silly, foolish, unwise)
11 years ago|13k views|share |citing 
APASmart Define. (2015). screwball thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/screwball/thesaurus/synonyms
ChicagoSmart Define. 2015. "screwball thesaurus" https://smartdefine.org/screwball/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, screwball thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/screwball/thesaurus/synonyms>.
MLASmart Define. "screwball thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/screwball/thesaurus/synonyms>