3
senseless
2
birdbrained
2
brainless
2
bubbleheaded
2
dense
2
dumb
1
airheaded
1
boneheaded
1
brain-dead
1
dim
1
dim-witted
1
doltish
1
dopey
1
dorky
1
dull
1
dunderheaded
1
empty-headed
1
fatuous
1
gormless
1
half-witted
<123>
13 years ago|5.4k views|share |citing 
APASmart Define. (2013). unsmart thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unsmart/thesaurus/synonyms
ChicagoSmart Define. 2013. "unsmart thesaurus" https://smartdefine.org/unsmart/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, unsmart thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unsmart/thesaurus/synonyms>.
MLASmart Define. "unsmart thesaurus" 28 June 2013. Web. 20 September 2026. <https://smartdefine.org/unsmart/thesaurus/synonyms>