148 entries under persistent topic. ×

21
immutable(adjective, hard, secure, rough, firm)
20
constant(adjective, strong, complete, secure, tough)
20
immobile(adjective, move, calm, quiet, strong)
20
unwavering(adjective, strong, secure, flat, firm)
19
adamant(adjective, mean, strong, hard, secure)
19
stable(adjective, adverb, calm, quiet, strong)
18
enduring(adjective, strong, sound, tough, flat)
18
invariable(adjective, severe, harsh, solid, ordinary)
18
rooted(verb, adjective, strong, hard, secure)
18
steady(adjective, adverb, move, strong, sound)
16
changeless(adjective, severe, firm, harsh, solid)
16
unalterable(adjective, strong, hard, secure, severe)
14
lasting(adjective, strong, tough, firm, stable)
14
resolved(verb, adjective, set, strong, flat)
14
unvarying(adjective, dull, clear, firm, solid)
13
decided(verb, adjective, set, firm, solid)
13
regular(adjective, firm, solid, exact, proper)
13
solid(adjective, set, strong, hard, sound)
12
eternal(adjective, wild, original, basic)
12
sure(adjective, clear, strong, flat, firm)
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APASmart Define. (2016). fixed thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/fixed/thesaurus/synonyms
ChicagoSmart Define. 2016. "fixed thesaurus" https://smartdefine.org/fixed/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, fixed thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/fixed/thesaurus/synonyms>.
MLASmart Define. "fixed thesaurus" 16 March 2016. Web. 21 September 2026. <https://smartdefine.org/fixed/thesaurus/synonyms>