218 entries under adjective topic. ×

24
continual(continue, determined, usual, steady)
24
unremitting(sound, continue, determined, steady)
22
continuous(sound, continue, steady, persistent)
22
sustained(strain, firmness, persistent, constant)
22
stationary(strain, firmness, labour, hardiness)
22
steadfast(strain, determined, steady, stable)
20
interminable(continue, determined, steady, persistent)
20
uninterrupted(sound, continue, steady, stable)
20
long-standing(strain, firmness, labour, hardiness)
20
rigid(strain, firmness, labour, hardiness)
20
settled(strain, firmness, labour, hardiness)
20
staying(strain, firmness, labour, hardiness)
19
quiescent(strain, firmness, labour, hardiness)
19
seamless(strain, firmness, continuous, labour)
19
stabile(strain, steady, stable, regular)
19
unalterable(strain, steady, stable, regular)
19
unyielding(strain, firmness, labour, hardiness)
18
fast(strain, firmness, labour, hardiness)
15
never-ending(continue, determined, constant, obstinate)
15
perennial(stable, constant, continuous, enduring)
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APASmart Define. (2016). perpetual thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/perpetual/thesaurus/synonyms
ChicagoSmart Define. 2016. "perpetual thesaurus" https://smartdefine.org/perpetual/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, perpetual thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/perpetual/thesaurus/synonyms>.
MLASmart Define. "perpetual thesaurus" 30 March 2016. Web. 27 September 2026. <https://smartdefine.org/perpetual/thesaurus/synonyms>