170 entries under adjective topic. ×

6
unwise(weak, simple, silly, foolish)
6
weak-minded(ability, planned)
5
brain-dead
5
daffy(weak, simple, slow, silly)
5
dim-witted(dull, simple, slow, foolish)
5
dizzy(simple, careless, foolish, stupid)
5
half-baked(dull, weak, simple, slow)
5
obtuse(dull, simple, slow, silly)
5
scatterbrained(simple, slow, stupid, boring)
5
thickheaded(simple, slow, stupid)
4
blockheaded(simple, slow, foolish, stupid)
4
dimwitted(simple, silly, foolish, stupid)
4
dotty(weak, simple, silly, foolish)
4
featherbrained(simple, careless, foolish, stupid)
4
feeble-minded(simple, slow, stupid, boring)
4
frivolous(simple, careless, foolish, stupid)
4
gaga(careless, silly, unsteady, inconstant)
4
unintellectual(simple, slow, stupid, boring)
3
addle-pated
3
beaglebrained
10 years ago|15k views|share |citing 
APASmart Define. (2016). brainless thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/brainless/thesaurus/synonyms
ChicagoSmart Define. 2016. "brainless thesaurus" https://smartdefine.org/brainless/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, brainless thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/brainless/thesaurus/synonyms>.
MLASmart Define. "brainless thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/brainless/thesaurus/synonyms>