4
faithful(adjective, tenacious)
4
fanatical(adjective, unreasonable, fervent, rigid, inflexible)
4
forceful
4
indocile(adjective, control, order, tough, resist)
4
intolerant(adjective, severe)
4
iron(adjective, set, mean, strong, hard)
4
morose(adjective, mean, difficult, cross, irritable)
4
noncooperative(adjective, sullen, unwilling)
4
purposeful(adjective, strong, tough, firm, deliberate)
4
stalwart(adjective, intense, deliberate, determined, resolute)
4
unadaptable(adjective, set, hard, stiff, rigid)
4
unchanging(moderate, firm, cautious, conventional, timid)
4
unconquerable
4
undaunted(adjective, tenacious)
4
undeviating(adjective, intense, deliberate, determined, resolute)
4
unfriendly(adjective, irritable, sullen, crabby, cranky)
4
unmoving
4
unreasonable(inflexible, stubborn, prejudiced, willful)
4
unremitting
3
acrimonious(adjective, mean, severe, cross, irritable)
11 years ago|28k views|share |citing 
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>