0
enduring(adjective, certain, resolute, persistent, constant)
0
eternal
0
fast(adjective, intense, resolute, persistent, reliable)
0
fixed(adjective, resolute, persistent, dedicated, unwavering)
0
genuine(adjective, firm, honest, ardent, upright)
0
go-to(adjective, test, expert, reliable)
0
high-principled(good, strong, solid, steady, consistent)
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immobile(adjective, intense, resolute, persistent, dedicated)
0
immovable(adjective, intense, resolute, persistent, dedicated)
0
in good faith(expression, adjective, idiom, firm, honest)
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incorrupt(good, strong, solid, steady, consistent)
0
incorruptible(adjective, honest, loyal)
0
inexhaustible
0
inexorable(adjective, intense, resolute, persistent, dedicated)
0
infallible
0
inflexible(adjective, resolute, persistent, reliable, steadfast)
0
intense(adjective, resolute, persistent, dedicated, loyal)
0
intent(adjective, resolute, persistent, dedicated, unwavering)
0
invariable
0
lasting
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APASmart Define. (2013). tried-and-true thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/tried-and-true/thesaurus/synonyms
ChicagoSmart Define. 2013. "tried-and-true thesaurus" https://smartdefine.org/tried-and-true/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2013, tried-and-true thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/tried-and-true/thesaurus/synonyms>.
MLASmart Define. "tried-and-true thesaurus" 28 June 2013. Web. 30 September 2026. <https://smartdefine.org/tried-and-true/thesaurus/synonyms>