5
hostile(adjective, negative, different, sullen, adverse)
5
implacable(adjective, mean, hard, cruel, determined)
5
indefatigable(adjective, tenacious)
5
opposed(adjective, negative, hostile, different, adverse)
5
peremptory(adjective, resolution, authoritative, overbearing)
5
positive(intense, deliberate, determined, resolute, prejudiced)
5
standing pat(adjective, determined, resolute, uncompromising, unshakeable)
5
steely(adjective, set, hard, stiff, rigid)
5
tireless(adjective, tenacious)
5
unalterable(adjective, hard, determined, fixed, inflexible)
5
undisciplined(adjective, control, order, tough, difficult)
5
unrepentant
5
wrongheaded(negative, hostile, different, adverse, conflicting)
4
assertive
4
brave(adjective, resolution, tenacious)
4
bulldogged(adjective, tenacious)
4
conflicting(adjective, negative, hostile, different, adverse)
4
cross(adjective, mean, difficult, irritable, ugly)
4
devoted(adjective, passionate, violent, determined, resolute)
4
enduring(adjective, determined, resolute, persistent, hardened)
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APASmart Define. (2015). obstinate thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/obstinate/thesaurus/synonyms
ChicagoSmart Define. 2015. "obstinate thesaurus" https://smartdefine.org/obstinate/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, obstinate thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/obstinate/thesaurus/synonyms>.
MLASmart Define. "obstinate thesaurus" 3 August 2015. Web. 25 September 2026. <https://smartdefine.org/obstinate/thesaurus/synonyms>