3
lingering(verb, fixed, persistent, lasting, remaining)
3
manageable(adjective, shy, meek, docile, obedient)
3
never-failing(adjective, strong, complete, flat, firm)
3
prolonged(adjective, persistent, lasting, remaining, continued)
3
secure(adjective, calm, strong, firm, solid)
3
strong(adjective, calm, tough, solid, steady)
3
unaltered
3
unflagging(adjective, persevering)
3
unvaried
3
wholehearted(adjective, set, complete, firm, total)
2
aged
2
ageless(adjective, fixed, constant, endless, indefinite)
2
bearing
2
consistent(adjective, strong, flat, firm, solid)
2
continued(adjective, continuous, lasting, permanent, everlasting)
2
deep-rooted(adjective, calm, strong, secure, firm)
2
dependable(adjective, strong, tough, firm, solid)
2
existing(verb, living, existing)
2
extended(adjective, continued)
2
hard and fast
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APASmart Define. (2015). abiding thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/abiding/thesaurus/synonyms
ChicagoSmart Define. 2015. "abiding thesaurus" https://smartdefine.org/abiding/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, abiding thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/abiding/thesaurus/synonyms>.
MLASmart Define. "abiding thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/abiding/thesaurus/synonyms>