170 entries under adjective topic. ×

2
rash(dull, silly, thoughtless, unwise)
2
rattle-brained
2
shallow(simple, slow, silly, stupid)
2
thick-witted
2
undiscerning
2
uninformed
2
unperceiving
2
unperceptive
1
addled(simple, slow, stupid, boring)
1
backward(simple, slow, silly, stupid)
1
bemused(careless, silly, unsteady, inconstant)
1
blind
1
blithering
1
bone-headed
1
changeful(careless, silly, unsteady, inconstant)
1
chuckle-headed
1
crass
1
ditzy(careless, silly, unsteady, inconstant)
1
dozy
1
dull-witted
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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>