277 entries under adjective topic. ×

18
tough(strong, hard, firm, serious)
16
unyielding(strong, hard, tough, firm)
15
flinty(strong, hard, tough, firm)
15
inflexible(strong, hard, tough, firm)
14
adamantine(strong, hard, tough, firm)
14
hard(strong, tough, firm, solid)
14
stony(hard, firm, solid, hostile)
13
obdurate(strong, hard, tough, cold)
13
rigid(strong, hard, tough, firm)
12
firm(strong, hard, tough, solid)
12
unbending(strong, hard, tough, firm)
12
uncompromising(set, determined, resolute, unsympathetic)
10
adamant(strong, hard, tough, resolute)
10
inexorable(strong, hard, tough, determined)
10
stern(severe, harsh, serious, resolute)
10
stiff(set, hard, firm, dead)
9
implacable(strong, hard, tough, determined)
9
unrelenting(strong, hard, tough, determined)
8
callous(cold, cruel, unfeeling, unsympathetic)
8
determined(strong, hard, tough, resolute)
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APASmart Define. (2015). steely thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/steely/thesaurus/synonyms
ChicagoSmart Define. 2015. "steely thesaurus" https://smartdefine.org/steely/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, steely thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/steely/thesaurus/synonyms>.
MLASmart Define. "steely thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/steely/thesaurus/synonyms>