646 entries under adjective topic. ×

94
firm(noun, feature, state, characteristic)
92
persistent(feature, state, characteristic, strong)
61
steady(feature, state, move, characteristic)
57
stable(calm, good, strong, secure)
54
unwavering(calm, close, strong, secure)
53
stiff(feature, state, characteristic, strong)
53
constant(calm, good, close, strong)
51
resolute(calm, close, clear, strong)
51
strong(calm, good, tough, easy)
51
unyielding(clear, strong, secure, tough)
49
rigid(feature, state, characteristic, secure)
46
consistent(strong, strain, flat, firm)
46
hard(feature, state, characteristic, strain)
44
sound(calm, strong, secure, easy)
43
determined(good, clear, strong, tough)
42
staunch(noun, calm, good, close)
40
unfluctuating(calm, strong, secure, strain)
37
fast(calm, close, strong, secure)
37
permanent(calm, strong, secure, strain)
35
stubborn(characteristic, quality, strong, secure)
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APASmart Define. (2016). steadfast thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/steadfast/thesaurus/synonyms
ChicagoSmart Define. 2016. "steadfast thesaurus" https://smartdefine.org/steadfast/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, steadfast thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/steadfast/thesaurus/synonyms>.
MLASmart Define. "steadfast thesaurus" 11 March 2016. Web. 21 September 2026. <https://smartdefine.org/steadfast/thesaurus/synonyms>