149 entries under rough topic. ×

42
unfeeling(noun, adjective, dull, mean, bad)
41
insensitive(noun, adjective, dull, quiet, mean)
37
hard(adjective, mean, hard, cool, tough)
30
cruel(adjective, mean, hard, cool, tough)
25
ruthless(adjective, mean, hard, tough, severe)
25
tough(noun, adjective, mean, hard, cool)
23
hard-boiled(noun, adjective, calm, person, mean)
19
merciless(adjective, person, mean, hard, tough)
19
numb(noun, verb, adjective, dull, hard)
19
obdurate(adjective, person, mean, hard, cool)
17
harsh(adjective, mean, hard, cool, tough)
15
indurate(verb, adjective, dull, close, set)
12
dull(noun, verb, adjective, quiet, develop)
10
inflexible(adjective, person, hard, tough)
10
severe(adjective, calm, mean, hard, tough)
9
stiff(adjective, set, strong, hard, severe)
8
firm(verb, adjective, close, set, fix)
7
savage(adjective, mean, hard, harsh)
6
adamant(adjective, person, mean, hard)
6
rude(adjective, dull, hard, nasty)
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APASmart Define. (2016). callous thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/callous/thesaurus/synonyms
ChicagoSmart Define. 2016. "callous thesaurus" https://smartdefine.org/callous/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, callous thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/callous/thesaurus/synonyms>.
MLASmart Define. "callous thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/callous/thesaurus/synonyms>