3
defensible(adjective, stable)
3
demonstrable(adjective, stable)
3
demonstratable(adjective, stable)
3
empirical(adjective, stable)
3
endless(adjective, stable)
3
endurable(adjective, stable)
3
enduring
3
eonian
3
establishable(adjective, stable)
3
eternal
3
everlasting
3
evincible(adjective, stable)
3
fair(adjective, stable)
3
feasible(adjective, stable)
3
forever(adjective, stable)
3
incessant(adjective, stable)
3
indefinite(adjective, stable)
3
indissoluble
3
justifiable(adjective, stable)
3
lasting(adjective, stable)
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APASmart Define. (2016). permanent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/permanent/thesaurus/related
ChicagoSmart Define. 2016. "permanent thesaurus" https://smartdefine.org/permanent/thesaurus/related (accessed September 21, 2026).
HarvardSmart Define 2016, permanent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/permanent/thesaurus/related>.
MLASmart Define. "permanent thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/permanent/thesaurus/related>