Synonyms|141Antonyms|73|Broader|1Narrower|0Related|600
3
constant
3
continuing
3
continuous
3
deathless
3
eterne(adjective, change, archaism)
3
hoary
3
imperishable(adjective, lasting, permanent, everlasting, unending)
3
incessant
3
infinite
3
old
3
undying
3
unremitting(adjective, steady, constant, continuous, lasting)
3
venerable
2
chronic
2
indefinite(adjective, lasting, permanent, everlasting, unending)
2
indestructible(lasting, permanent, everlasting, unending, undying)
2
never-ending
2
nonstop
2
perdurable(lasting, permanent, everlasting, unending, undying)
2
perennial(adjective, lasting, permanent, everlasting, unending)
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APASmart Define. (2016). dateless thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/dateless/thesaurus/synonyms
ChicagoSmart Define. 2016. "dateless thesaurus" https://smartdefine.org/dateless/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, dateless thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/dateless/thesaurus/synonyms>.
MLASmart Define. "dateless thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/dateless/thesaurus/synonyms>