174 entries under adjective topic. ×

1
spunky
1
stiff
1
stoical
1
stony
1
sturdy(strong, sound, tough, fit)
1
surviving
1
tried-and-true(certain, constant, reliable, trustworthy)
1
trustworthy(certain, constant, reliable, steadfast)
1
unalterable
1
undeterred(strong, firm, determined, steady)
1
unhesitating
1
unretiring
1
unshakeable
1
unstinted(strong, firm, determined, steady)
1
vivacious(strong, moving, lively, active)
1
zippy(strong, tough, fit, lively)
0
allegiant(trustworthy, faithful)
0
attached(trustworthy, faithful)
0
bulldog
0
deep-rooted
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APASmart Define. (2015). unflagging thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unflagging/thesaurus/synonyms
ChicagoSmart Define. 2015. "unflagging thesaurus" https://smartdefine.org/unflagging/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unflagging thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unflagging/thesaurus/synonyms>.
MLASmart Define. "unflagging thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unflagging/thesaurus/synonyms>