1
aliene
1
anomalous
1
ape(silly, foolish, crazy, mad, insane)
1
arbitrary
1
ballock
1
basket case(noun, slang, sick, mad person)
1
beany
1
berserk(silly, foolish, crazy, mad, insane)
1
bigot(noun, crazy, nut, fanatic, lunatic)
1
blockhead(noun, person, dummy)
1
bollock
1
borderline case
1
bowl
1
brainless
1
bubbleheaded
1
buggy
1
bughouse
1
bugs
1
card
1
cast
11 years ago|13k views|share |citing 
APASmart Define. (2015). screwball thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/screwball/thesaurus/synonyms
ChicagoSmart Define. 2015. "screwball thesaurus" https://smartdefine.org/screwball/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, screwball thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/screwball/thesaurus/synonyms>.
MLASmart Define. "screwball thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/screwball/thesaurus/synonyms>