69 entries under impassive topic. ×

25
dull(noun, adjective, calm, simple, tough)
25
stoic(adjective, calm, dull, cool, tough)
23
indifferent(adjective, calm, dull, quiet, cool)
19
unemotional(adjective, calm, dull, quiet, cool)
17
apathetic(adjective, calm, dull, quiet, cool)
17
obtuse(noun, adjective, dull, simple, slow)
15
stupid(adjective, dull, simple, slow, intelligent)
14
phlegmatic(adjective, calm, dull, quiet, cool)
13
slow(adjective, dull, quiet, simple, flat)
13
dispassionate(adjective, calm, quiet, cool, relaxed)
12
doltish(verb, adjective, dull, simple, slow)
11
dense(adjective, dull, simple, slow, foolish)
11
stoical(adjective, calm, cool, blank, aloof)
9
dumb(adjective, dull, simple, slow, foolish)
9
calm(adjective, quiet, cool, tough, rational)
8
imperturbable(adjective, calm, quiet, cool, relaxed)
7
slow-witted(adjective, dull, slow, stupid)
7
unfeeling(noun, adjective, calm, cool, tough)
7
inert(adjective, dull, quiet, moving, flat)
7
passive(adjective, calm, dull, indifferent, stupid)
10 years ago|21k views|share |citing 
APASmart Define. (2016). stolid thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/stolid/thesaurus/synonyms
ChicagoSmart Define. 2016. "stolid thesaurus" https://smartdefine.org/stolid/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, stolid thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/stolid/thesaurus/synonyms>.
MLASmart Define. "stolid thesaurus" 3 March 2016. Web. 26 September 2026. <https://smartdefine.org/stolid/thesaurus/synonyms>