162 entries under definite topic. ×

24
unalterable(adjective, calm, strong, secure, strain)
23
tenacious(adjective, clear, strong, secure, tough)
23
uncompromising(adjective, clear, secure, tough, severe)
22
persevering(adjective, strong, tough, flat, firm)
22
set(verb, adjective, calm, strong, secure)
22
unbending(adjective, clear, strong, tough, severe)
20
resolved(adjective, strong, flat, firm, certain)
19
adamant(adjective, strong, secure, tough, flat)
19
true(adjective, good, close, strong, kind)
16
reliable(adjective, calm, close, strong, secure)
15
sure(adjective, calm, good, close, strong)
15
unchanging(adjective, close, correct, firm, honest)
14
abiding(adjective, calm, strong, complete, secure)
14
solid(adjective, calm, good, strong, secure)
13
unchangeable(adjective, calm, strong, secure, flat)
13
undeviating(adjective, strong, flat, firm, solid)
12
changeless(adjective, firm, solid, certain, steady)
12
intent(adjective, strong, flat, intense, certain)
10
unfailing(adjective, good, strong, honest, solid)
9
decided(adjective, firm, intense, certain, deliberate)
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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>