113 entries under adjective topic. ×

3
eterne(change, archaism)
3
evergreen(endless, everlasting, eternal, perpetual)
3
forever(vast, lasting, permanent, everlasting)
3
indefinite(lasting, permanent, everlasting, eternal)
3
nonstop
3
ongoing
3
round-the-clock(continue, continual)
3
unbounded
3
unfailing
3
uninterrupted(continue, steady, regular, constant)
3
without end(expression, vast, lasting, permanent)
2
immeasurable(endless, infinite, boundless, incessant)
2
changeless
2
chronic
2
continued(steady, stable, regular, lasting)
2
illimitable(infinite, eternal)
2
immediate
2
incalculable
2
inexhaustible
2
infelicitous
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APASmart Define. (2016). timeless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/timeless/thesaurus/synonyms
ChicagoSmart Define. 2016. "timeless thesaurus" https://smartdefine.org/timeless/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, timeless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/timeless/thesaurus/synonyms>.
MLASmart Define. "timeless thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/timeless/thesaurus/synonyms>