61 entries under stupid topic. ×

19
slow(adjective, dull, simple, ability, silly)
16
dull(adjective, dull, simple, ability, low)
10
dense(adjective, dull, simple, slow, silly)
9
ignorant(adjective, simple, knowledge, slow, rude)
8
simple(adjective, dull, quiet, ability, slow)
7
imbecile(adjective, dull, simple, slow, silly)
7
moronic(adjective, dull, simple, slow, silly)
6
conservative(adjective, dull, moderate, low)
6
dim-witted(adjective, dull, simple, slow, foolish)
6
dumb(adjective, dull, simple, slow, silly)
6
feeble-minded(adjective, dull, simple, ability, slow)
6
obtuse(adjective, dull, simple, slow, silly)
6
sluggish(adjective, adverb, dull, simple, low)
6
unprogressive(adjective, dull, moderate, low)
5
half-baked(adjective, simple, slow, boring)
5
half-witted(adjective, dull, simple, ability, slow)
4
doltish(adjective, simple, slow, sluggish)
4
thick(adjective, dull, simple, slow, silly)
3
simple-minded(adjective, dull, simple, ability, slow)
3
soft(adjective, weak, ability, informal, base)
10 years ago|18k views|share |citing 
APASmart Define. (2016). backward thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/backward/thesaurus/synonyms
ChicagoSmart Define. 2016. "backward thesaurus" https://smartdefine.org/backward/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, backward thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/backward/thesaurus/synonyms>.
MLASmart Define. "backward thesaurus" 23 March 2016. Web. 24 September 2026. <https://smartdefine.org/backward/thesaurus/synonyms>