85 entries under obstinate topic. ×

1
iron(adjective, persistent, insistent, dogged)
1
locked(determined, stubborn, willful)
1
mulish(adjective, strong, hard, tough, severe)
1
mutinous(adjective, persistent, insistent, dogged)
1
obsessive(adjective, persistent, insistent, dogged)
1
pat(tough, difficult, wild, awkward)
1
persistent(adjective, insistent, dogged)
1
perverse(tough, difficult, awkward, stubborn)
1
resolved(adjective, persistent, insistent, dogged)
1
rough(adjective, strong, hard, tough, harsh)
1
self-willed(tough, difficult, wild, awkward)
1
set(adjective, persistent, insistent, dogged)
1
single-minded(adjective, persistent, insistent, dogged)
1
stouthearted(adjective, persistent, insistent, dogged)
1
tough nut(expression, stubborn, willful)
1
unconquerable(adjective, persistent, insistent, dogged)
1
undisciplined(tough, difficult, wild, awkward)
1
unflinching(adjective, persistent, insistent, dogged)
1
unpliable(tough, difficult, wild, awkward)
1
unregenerate(adjective, persistent, insistent, dogged)
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APASmart Define. (2015). hard-line thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/hard-line/thesaurus/synonyms
ChicagoSmart Define. 2015. "hard-line thesaurus" https://smartdefine.org/hard-line/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, hard-line thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/hard-line/thesaurus/synonyms>.
MLASmart Define. "hard-line thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/hard-line/thesaurus/synonyms>