70 entries under persistent topic. ×

22
sustained(adjective, strain, firmness, constant)
22
steadfast(adjective, strain, determined, steady, stable)
20
interminable(adjective, continue, determined, steady)
20
uninterrupted(adjective, sound, continue, steady, stable)
19
stabile(adjective, strain, steady, stable, regular)
19
unalterable(adjective, strain, steady, stable, regular)
13
unbroken(verb, adjective, sound, steady, stable)
12
unchanging(adjective, steady, stable, regular, fixed)
11
abiding(adjective, stable, fixed, constant)
10
fixed(adjective, dull, determined, usual, steady)
10
relentless(adjective, continue, determined, steady)
10
unvarying(adjective, steady, stable, regular, fixed)
9
habitual(adjective, usual, steady, stable, regular)
9
immutable(adjective, steady, stable, regular, fixed)
9
regular(verb, adjective, sound, usual, steady)
9
unfailing(adjective, continue, steady, fixed)
8
nonstop(adjective, continue, steady, stable, regular)
7
chronic(adjective, usual, regular, routine, normal)
7
unrelenting(adjective, determined, steady, constant)
5
uniform(adjective, dull, steady, stable, regular)
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APASmart Define. (2016). perpetual thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/perpetual/thesaurus/synonyms
ChicagoSmart Define. 2016. "perpetual thesaurus" https://smartdefine.org/perpetual/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, perpetual thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/perpetual/thesaurus/synonyms>.
MLASmart Define. "perpetual thesaurus" 30 March 2016. Web. 23 September 2026. <https://smartdefine.org/perpetual/thesaurus/synonyms>