646 entries under adjective topic. ×

9
sturdy(calm, strong, tough, firm)
8
courageous(clear, strong, tough, severe)
8
dauntless(determined, noble, bold, resolute)
8
immobile(move, calm, secure, still)
8
true-blue(good, close, strong, kind)
8
unshakeable(determined, resolute, uncompromising)
7
ardent(close, kind, correct, keen)
7
bold(resolute, tenacious)
7
certain(good, strong, complete, easy)
7
decisive(good, strong, honest, solid)
7
intrepid
7
liege(continue, firm, honest, sensible)
7
plucky(determined, noble, resolute, courageous)
7
steely(determined, resolute, strict, obstinate)
7
unmovable(move, calm, certain, still)
6
assiduous
6
fearless(steady, noble, bold, resolute)
6
hard-nosed(firm, determined, resolute, obstinate)
6
headstrong(tough, firm, determined, unreasonable)
6
heroic(vigorous, noble, resolute, stout)
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APASmart Define. (2016). steadfast thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/steadfast/thesaurus/synonyms
ChicagoSmart Define. 2016. "steadfast thesaurus" https://smartdefine.org/steadfast/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, steadfast thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/steadfast/thesaurus/synonyms>.
MLASmart Define. "steadfast thesaurus" 11 March 2016. Web. 24 September 2026. <https://smartdefine.org/steadfast/thesaurus/synonyms>