1,209 entry under adjective topic. ×

18
sheer(severe, difficult, cold, complex)
18
troublesome(tough, evil, difficulty, rough)
17
cold-blooded(person, mean, cool, tough)
17
hardened(tough, severe, firm, attitude)
17
ruthless(mean, tough, severe, evil)
17
strenuous(dull, great, tough, severe)
17
uncompromising(mean, severe, rough, difficult)
17
unkind(person, mean, cool, tough)
16
exacting(dull, tough, easy, severe)
16
hardhearted(person, mean, severe, attitude)
16
obstinate(mean, tough, rough, harsh)
16
unbending(mean, strong, tough, severe)
16
unrelenting(mean, strong, tough, severe)
15
impenetrable(characteristic, tough, firm, solid)
15
pitiless(mean, tough, severe, nasty)
15
unfriendly(person, mean, evil, rough)
14
cool(person, mean, unpleasant, cold)
14
formidable(tough, severe, evil, difficulty)
14
heavy(person, dull, body, strong)
14
inexorable(mean, strong, tough, severe)
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APASmart Define. (2016). hard thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/hard/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard thesaurus" https://smartdefine.org/hard/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, hard thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/hard/thesaurus/synonyms>.
MLASmart Define. "hard thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/hard/thesaurus/synonyms>