39 entries under adjective topic. ×

3
continual(stable, constant, enduring, lasting)
3
continuing(continue, fundamental, permanent, operating)
3
infinite(end, limitless)
3
persisting(permanent, continuing, long-term, lifelong)
3
tough(calm, strong, solid, steady)
2
continuous
2
immortal
2
old(continue, permanent, continuing, recurrent)
2
unbreakable(strong, tough)
2
undying(continuous, enduring, lasting, permanent)
1
persevering
1
pursuing
0
advancing
0
carrying on
0
maintaining
0
progressing
0
serviceable
0
sustaining
0
unfailing
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APASmart Define. (2016). perdurable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/perdurable/thesaurus/synonyms
ChicagoSmart Define. 2016. "perdurable thesaurus" https://smartdefine.org/perdurable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, perdurable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/perdurable/thesaurus/synonyms>.
MLASmart Define. "perdurable thesaurus" 3 March 2016. Web. 23 September 2026. <https://smartdefine.org/perdurable/thesaurus/synonyms>