5
nitwit(noun, simple, fool, innocent, jerk)
5
nutcase(noun, slang, sick, nut, fanatic)
5
psycho(noun, slang, mad, sick, patient)
5
weirdo(noun, slang, wise)
4
addle-head
4
addlehead
4
boor(noun, commonalty)
4
flake(noun, slang, mad, sick, fanatic)
4
ninny(noun, simple, fool, innocent, jerk)
4
put(fool, commonalty)
3
dimwit(noun, simple, fool, innocent, jerk)
3
ass(noun, simple, fool, innocent, jerk)
3
block
3
blockhead(noun, simple, fool, innocent, jerk)
3
bonehead(noun, simple, fool, innocent, jerk)
3
clown(noun, simple, fool, innocent, jerk)
3
crank(noun, informal, mad, wise, schizophrenic)
3
cretin(noun, simple, fool, innocent, jerk)
3
dingbat(noun, slang, wise, fanatic, ultraist)
3
goose(noun, simple, fool, innocent, bird)
10 years ago|6.7k views|share |citing 
APASmart Define. (2016). loon thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/loon/thesaurus/synonyms
ChicagoSmart Define. 2016. "loon thesaurus" https://smartdefine.org/loon/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, loon thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/loon/thesaurus/synonyms>.
MLASmart Define. "loon thesaurus" 29 February 2016. Web. 21 September 2026. <https://smartdefine.org/loon/thesaurus/synonyms>