130 entries under obstinate topic. ×

13
unflagging(adjective, strong, firm, solid, steady)
12
single-minded(adjective, firm, sensible, harsh, solid)
12
sure(adjective, good, clear, strong, tough)
12
unswayable(adjective, hard, firm, resolute)
11
confirmed(verb, adjective, usual, regular, persistent)
11
headstrong(adjective, tough, firm, careless, deliberate)
11
intractable(adjective, deliberate, fixed, resolute, persistent)
11
standing pat(adjective, resolute, uncompromising, unshakeable)
11
strong(adjective, good, hard, tough, easy)
10
purposeful(adjective, strong, tough, keen, firm)
9
hard(adjective, strong, tough, severe, harsh)
9
refractory(adjective, tough, firm, persistent, impulsive)
9
stern(adjective, resolute, persistent, rigid)
9
true(adjective, good, clear, strong, tough)
8
iron(adjective, strong, hard, tough, firm)
8
mulish(adjective, tough, firm, resolute, impulsive)
8
steely(adjective, strong, hard, tough, resolute)
7
contrary(adjective, resolute, persistent, impulsive)
7
implacable(adjective, strong, hard, tough, harsh)
7
pigheaded(adjective, tough, firm, deliberate, usual)
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APASmart Define. (2016). determined thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/determined/thesaurus/synonyms
ChicagoSmart Define. 2016. "determined thesaurus" https://smartdefine.org/determined/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, determined thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/determined/thesaurus/synonyms>.
MLASmart Define. "determined thesaurus" 31 March 2016. Web. 28 September 2026. <https://smartdefine.org/determined/thesaurus/synonyms>