3
simpleton(noun, simple, fool, stupid, innocent)
3
tomfool(noun, simple, prompt, fool, silly)
3
toolbox(noun, person, individual, underdog, halfwit)
2
bonehead(noun, simple, fool, innocent, jerk)
2
boob(simple, fool, stupid, innocent, sap)
2
donkey
2
dullard(noun, dolt)
2
dumb ox(noun, expression, simple, fool, silly)
2
dummy
2
fathead(noun, simple, fool, silly, innocent)
2
fatuous
2
goose(noun, simple, fool, silly, innocent)
2
halfwit(noun, simple, fool, silly, innocent)
2
ignoramus(simple, fool, stupid, innocent, sap)
2
imbecile(noun, person, simple, fool, innocent)
2
kook(noun, person, crazy, mad, fanatic)
2
lightweight(simple, fool, innocent, jerk, clown)
2
mindless
2
ninnyhammer
2
senseless
11 years ago|7.4k views|share |citing 
APASmart Define. (2015). lamebrain thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/lamebrain/thesaurus/synonyms
ChicagoSmart Define. 2015. "lamebrain thesaurus" https://smartdefine.org/lamebrain/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, lamebrain thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/lamebrain/thesaurus/synonyms>.
MLASmart Define. "lamebrain thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/lamebrain/thesaurus/synonyms>