2
firm(adjective, strong, determined, steady, resolute)
2
flat(adjective, continuous)
2
gradual
2
homogeneous(adjective, persistent, continuous, endless, relentless)
2
immemorial(lasting, permanent, everlasting, unending, undying)
2
immutable(adjective, persistent, constant, continuous, endless)
2
indestructible(lasting, permanent, everlasting, unending, undying)
2
indomitable(adjective, strong, firm, determined, steady)
2
inert
2
inexhaustible(adjective, strong, firm, energetic, determined)
2
inexorable(adjective, hard, tough, harsh, cruel)
2
infinite(continuous, endless, unrelenting, everlasting, uninterrupted)
2
intransmutable
2
invariant
2
lifelong(permanent, long-term, diuturnity)
2
loyal
2
mortal
2
on and on(verb, expression, adverb, phrasal verb, continuously)
2
patient(adjective, strong, firm, energetic, determined)
2
perdurable(continuous, lasting, permanent, everlasting, unending)
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APASmart Define. (2015). unremitting thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unremitting/thesaurus/synonyms
ChicagoSmart Define. 2015. "unremitting thesaurus" https://smartdefine.org/unremitting/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unremitting thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unremitting/thesaurus/synonyms>.
MLASmart Define. "unremitting thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/unremitting/thesaurus/synonyms>