85 entries under fixed topic. ×

17
unchangeable(adjective, calm, strong, solid, substantial)
12
continual(adjective, usual, steady, stable, regular)
12
immobile(secure, steady, immovable, static)
11
imperishable(adjective, constant, enduring, lasting)
10
continuing(adjective, time, continue, established)
9
set(verb, adjective, calm, steady, stable)
8
unchanged(adjective, unaffected, static, unvarying)
8
unvarying(adjective, calm, strong, secure, firm)
6
ageless(adjective, lasting, unchanging, unchangeable)
6
indelible(adjective, firm, true, constant)
6
irrevocable(adjective, unchangeable)
6
regular(adjective, usual, steady, stable, routine)
6
unfailing(steady, constant, continuous, frequent)
6
uninterrupted(adjective, steady, stable, regular)
5
faithful(firm, true, constant, steadfast)
5
loyal(firm, true, constant, steadfast)
5
solid(adjective, calm, strong, secure, steady)
5
unfading(adjective, constant, vast, enduring)
4
irretrievable(adjective, unchangeable, unalterable)
4
rooted(verb, adjective, secure, usual, steady)
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APASmart Define. (2016). permanent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/permanent/thesaurus/synonyms
ChicagoSmart Define. 2016. "permanent thesaurus" https://smartdefine.org/permanent/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, permanent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/permanent/thesaurus/synonyms>.
MLASmart Define. "permanent thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/permanent/thesaurus/synonyms>