2
unabating(adjective, persistent, continuous, lasting, continuing)
2
unending(adjective, persistent, constant, current, continuous)
2
universal(adjective, usual, regular, normal, accepted)
2
unrelenting(adjective, persistent, constant, continuous, endless)
2
unremitting(adjective, resolute, persistent, constant, living)
2
wonted(common, natural, usual, regular, normal)
1
addicted
1
addictive
1
admittedly
1
age-long
1
ancient
1
antique
1
assuredly
1
built-in
1
canonical(adjective, regular)
1
certainly
1
chronically
1
chronics
1
congenital
1
continue
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APASmart Define. (2016). chronic thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/chronic/thesaurus/synonyms
ChicagoSmart Define. 2016. "chronic thesaurus" https://smartdefine.org/chronic/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, chronic thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/chronic/thesaurus/synonyms>.
MLASmart Define. "chronic thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/chronic/thesaurus/synonyms>