1
continuing
1
continuous
1
convinced(adjective, clear, certain, definite, positive)
1
convincing(adjective, clear, certain, definite, positive)
1
counted on
1
dead set on(expression, adjective, idiom, strong, solid)
1
decided(adjective, clear, certain, limited, definite)
1
dedicated(adjective, complete, warm, firm, total)
1
defined(adjective, certain, limited, definite, inflexible)
1
definite(adjective, clear, strong, complete, flat)
1
definitive(adjective, certain, limited, definite, absolute)
1
delivering
1
dependable(adjective, firm, solid, certain, stable)
1
determinate(adjective, certain, limited, definite, inflexible)
1
determined(adjective, strong, complete, flat, warm)
1
diligent
1
doubtless(adjective, clear, certain, definite, sure)
1
dyed-in-the-wool
1
endure
1
everlasting
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APASmart Define. (2015). never-failing thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/never-failing/thesaurus/synonyms
ChicagoSmart Define. 2015. "never-failing thesaurus" https://smartdefine.org/never-failing/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, never-failing thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/never-failing/thesaurus/synonyms>.
MLASmart Define. "never-failing thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/never-failing/thesaurus/synonyms>