129 entries under severe topic. ×

83
inflexible(adjective, person, strong, hard, secure)
69
rigid(adjective, strong, hard, tough)
66
uncompromising(adjective, hard, secure, tough)
61
inexorable(adjective, mean, strong, hard, tough)
54
obstinate(adjective, strong, hard, tough)
53
unbending(adjective, strong, hard, tough)
50
firm(noun, adjective, strong, hard, secure)
48
resolute(adjective, strong, hard, secure, tough)
46
relentless(adjective, mean, strong, hard, tough)
46
unrelenting(adjective, mean, strong, hard, tough)
37
stiff(adjective, hard, tough, rough)
30
hard(adjective, mean, strong, cool, tough)
25
hard-nosed(adjective, strong, hard, secure, tough)
25
stony(adjective, person, mean, hard, cool)
21
tough(adjective, mean, strong, hard, cool)
19
hardened(adjective, person, hard, tough)
17
callous(adjective, person, mean, hard, cool)
16
grim(adjective, mean, strong, hard, tough)
16
severe(adjective, mean, strong, hard, tough)
15
stern(adjective, mean, hard, tough)
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APASmart Define. (2016). obdurate thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/obdurate/thesaurus/synonyms
ChicagoSmart Define. 2016. "obdurate thesaurus" https://smartdefine.org/obdurate/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, obdurate thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/obdurate/thesaurus/synonyms>.
MLASmart Define. "obdurate thesaurus" 23 March 2016. Web. 23 September 2026. <https://smartdefine.org/obdurate/thesaurus/synonyms>