2
recalcitrant(adjective, determined, fixed, persistent, obstinate)
2
rocky
2
secure
2
serious(adjective, strong, firm, determined, resolute)
2
spirited
2
thorough(adjective, resolute)
2
unalarmed(adjective, bold, courage, unconcerned, brave)
2
unalterable(strong, certain, determined, definite, fixed)
2
undiscouraged(adjective, bold, unconcerned, brave, steadfast)
2
undrooping
2
unfailing(adjective, set, strong, firm, determined)
2
unflappable
2
unmanageable(adjective, determined, fixed, persistent, obstinate)
2
unmoved(adjective, determined, fixed, stubborn)
2
unremitting(adjective, strong, firm, energetic, determined)
2
unwearied(adjective, strong, firm, energetic, determined)
2
unwearying
2
venturesome
1
abiding(adjective, strong, flat, certain, determined)
1
adventurous
11 years ago|9k views|share |citing 
APASmart Define. (2015). unflinching thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unflinching/thesaurus/synonyms
ChicagoSmart Define. 2015. "unflinching thesaurus" https://smartdefine.org/unflinching/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unflinching thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unflinching/thesaurus/synonyms>.
MLASmart Define. "unflinching thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/unflinching/thesaurus/synonyms>