Synonyms|66Antonyms|0|Broader|0Narrower|0Related|3
1
headstrong(adjective, hard, tough, severe, rough)
1
hell-bent(adjective, persistent, obstinate, insistent, dogged)
1
hidebound(adjective, persistent, obstinate, insistent, dogged)
1
indomitable(adjective, persistent, obstinate, insistent, dogged)
1
inexorable(adjective, persistent, obstinate, insistent, dogged)
1
inflexible(adjective, hard, tough, severe, rough)
1
insubordinate(adjective, persistent, obstinate, insistent, dogged)
1
insurgent(adjective, persistent, obstinate, insistent, dogged)
1
intractable(adjective, persistent, obstinate, insistent, dogged)
1
inveterate(adjective, persistent, obstinate, insistent, dogged)
1
invincible(adjective, persistent, obstinate, insistent, dogged)
1
iron(adjective, persistent, obstinate, insistent, dogged)
1
mutinous(adjective, persistent, obstinate, insistent, dogged)
1
narrow-minded(adjective, persistent, obstinate, insistent, dogged)
1
obdurate(adjective, hard, tough, severe, rough)
1
obsessive(adjective, persistent, obstinate, insistent, dogged)
1
obstinate(adjective, hard, tough, severe, rough)
1
persistent(adjective, obstinate, insistent, dogged)
1
recalcitrant(adjective, persistent, obstinate, insistent, dogged)
1
refractory(adjective, persistent, obstinate, insistent, dogged)
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APASmart Define. (2011). hard-shelled thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/hard-shelled/thesaurus/synonyms
ChicagoSmart Define. 2011. "hard-shelled thesaurus" https://smartdefine.org/hard-shelled/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2011, hard-shelled thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/hard-shelled/thesaurus/synonyms>.
MLASmart Define. "hard-shelled thesaurus" 24 May 2011. Web. 26 September 2026. <https://smartdefine.org/hard-shelled/thesaurus/synonyms>