2
napping(careless, thoughtless, inconsiderate)
2
nescient(adjective, innocent, ignorant, unfamiliar, unconscious)
2
not bright(expression, adjective, simple, slow, stupid)
2
out of it(expression, adjective, idiom, silly, foolish)
2
pea-brained
2
preposterous(weak, simple, silly, foolish, thoughtless)
2
psycho
2
rattle-brained
2
short-sighted(adjective, weak, simple, silly, foolish)
2
shortsighted(dull, unintelligent)
2
simpleminded(dull, silly, foolish, stupid, unintelligent)
2
strange(impractical, half-baked, doomed)
2
subnormal
2
thick-witted(adjective, stupid)
2
tomfool(adjective, foolish)
2
unconsidered
2
unmindful(adjective, careless, silly, foolish, innocent)
2
unperceptive(adjective, obtuse, unobservant)
2
unreflecting
2
unreflective(careless, stupid, unthinking, obtuse, unperceptive)
11 years ago|20k views|share |citing 
APASmart Define. (2015). witless thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/witless/thesaurus/synonyms
ChicagoSmart Define. 2015. "witless thesaurus" https://smartdefine.org/witless/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, witless thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/witless/thesaurus/synonyms>.
MLASmart Define. "witless thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/witless/thesaurus/synonyms>