Synonyms|178Antonyms|32|Broader|2Narrower|0Related|7
2
exacting(adjective, persistent, obstinate, insistent, dogged)
2
hard-boiled(adjective, strong, hard, tough, severe)
2
hard-nosed(adjective, strong, hard, tough, severe)
2
narrow-minded(adjective, persistent, obstinate, insistent, dogged)
2
obdurate(adjective, strong, hard, tough, severe)
2
obstinate(adjective, hard, tough, rough, firm)
2
puritan
2
recalcitrant(difficult, awkward, persistent, obstinate, stubborn)
2
refractory(difficult, awkward, persistent, obstinate, stubborn)
2
stubborn(adjective, strong, hard, tough, rough)
2
tenacious(difficult, awkward, persistent, obstinate, stubborn)
2
unbending(adjective, strong, hard, tough, rough)
2
uncooperative(difficult, awkward, persistent, obstinate, stubborn)
2
ungovernable(difficult, awkward, persistent, obstinate, stubborn)
2
unmanageable(difficult, awkward, persistent, obstinate, stubborn)
2
unruly(difficult, awkward, persistent, obstinate, stubborn)
2
wayward(difficult, awkward, persistent, obstinate, stubborn)
1
adamantine(adjective, strong, hard, tough, severe)
1
anal-retentive(adjective, persistent, obstinate, insistent, dogged)
1
astringent(adjective, strong, hard, tough, severe)
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APASmart Define. (2015). hard-line thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/hard-line/thesaurus/synonyms
ChicagoSmart Define. 2015. "hard-line thesaurus" https://smartdefine.org/hard-line/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, hard-line thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/hard-line/thesaurus/synonyms>.
MLASmart Define. "hard-line thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/hard-line/thesaurus/synonyms>