50 entries under unresponsive topic. ×

36
dull(noun, adjective, dull, simple, sharp)
26
dense(adjective, dull, simple, ability, slow)
24
stupid(adjective, dull, simple, ability, slow)
19
stolid(noun, adjective, dull, simple, slow)
19
doltish(verb, adjective, dull, simple, ability)
18
slow(adjective, dull, simple, heavy, silly)
17
dumb(adjective, dull, simple, ability, slow)
16
blunt(adjective, dull, sharp, flat, heavy)
15
slow-witted(adjective, dull, slow, stupid, impassive)
14
insensitive(noun, adjective, dull, hard, slow)
7
bovine(adjective, dull, careless, heavy, foolish)
7
imperceptive(adjective, hard, obscure, difficult, slow)
7
lumpish(adjective, dull, heavy, stupid, vulgar)
6
crass(adjective, hard, indifferent, coarse, vulgar)
6
heavy(adjective, dull, stupid, impassive)
6
impassive(adjective, dull, hard, slow, stupid)
6
thick-skinned(noun, adjective, hard, indifferent, unfeeling)
5
apathetic(adjective, dull, hard, unfeeling, unsympathetic)
4
unfeeling(noun, adjective, hard, indifferent, unsympathetic)
4
callous(noun, adjective, hard, indifferent, unfeeling)
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APASmart Define. (2015). obtuse thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/obtuse/thesaurus/synonyms
ChicagoSmart Define. 2015. "obtuse thesaurus" https://smartdefine.org/obtuse/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, obtuse thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/obtuse/thesaurus/synonyms>.
MLASmart Define. "obtuse thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/obtuse/thesaurus/synonyms>