Synonyms|905Antonyms|165|Broader|8Narrower|0Related|298

105 entries under strong topic. ×

8
cruel(adjective, mean, hard, cool)
7
bullheaded(adjective, hard, tough, deliberate)
7
persevering(adjective, tough, flat, firm)
7
unswerving(adjective, tough, firm, determined)
6
staunch(adjective, tough, flat, firm)
5
authoritarian(adjective, hard, tough, severe)
5
insensible(adjective, hard, tough, severe)
5
unchangeable(adjective, hard, definite, inflexible)
5
unsparing(adjective, close, hard, tough)
3
dense(adjective, hard, tough, sturdy)
3
indomitable(adjective, hard, tough, difficult)
3
undeviating(adjective, flat, harsh, certain)
3
unflinching(adjective, flat, harsh, certain)
2
astringent(adjective, close, hard, tough)
2
bound(adjective, tough, flat, firm)
2
dead set on(expression, adjective, idiom, secure)
2
enduring(adjective, flat, certain, determined)
2
forbidding(adjective, person, close, hard)
2
hard-line(adjective, hard, tough, severe)
2
hard as nails(expression, adjective, idiom, hard)
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ChicagoSmart Define. 2016. "obdurate thesaurus" https://smartdefine.org/obdurate/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, obdurate thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/obdurate/thesaurus/synonyms>.
MLASmart Define. "obdurate thesaurus" 23 March 2016. Web. 26 September 2026. <https://smartdefine.org/obdurate/thesaurus/synonyms>