646 entries under adjective topic. ×

3
bulldogged
3
bullheaded(tough, firm, determined, resolute)
3
clear(set, complete, tough, severe)
3
continuing
3
contumacious(tough, firm, persistent, obstinate)
3
convinced(clear, certain, determined, definite)
3
deep-rooted(calm, strong, solid, steady)
3
die-hard(firm, honest, determined, unreasonable)
3
enthusiastic(complete, keen, warm, total)
3
equable(calm, strong, secure, firm)
3
fervent(clear, complete, tough, severe)
3
flinty
3
gallant(noble, bold, unconcerned, brave)
3
good(strong, honest, solid, pure)
3
hanging tough(expression, determined, usual, regular)
3
honest(close, strong, open, correct)
3
inalterable(certain, limited, definite, fixed)
3
incontestable(clear, certain, definite, unquestionable)
3
indestructible(stable, constant, enduring, lasting)
3
indisputable(clear, certain, definite, unquestionable)
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APASmart Define. (2016). steadfast thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/steadfast/thesaurus/synonyms
ChicagoSmart Define. 2016. "steadfast thesaurus" https://smartdefine.org/steadfast/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, steadfast thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/steadfast/thesaurus/synonyms>.
MLASmart Define. "steadfast thesaurus" 11 March 2016. Web. 25 September 2026. <https://smartdefine.org/steadfast/thesaurus/synonyms>