113 entries under adjective topic. ×

3
habitual(persistent, continuous, hardened, lasting)
3
livelong(durable, diuturnity)
3
long
3
nonstop
3
periodic
3
prolonged(persistent, lasting, durable, remaining)
3
seamless
3
straight
3
unchangeable(continuous, stability)
3
undeviating(continuous, stability)
2
ageless(constant, endless, indefinite, lasting)
2
changeless(stable, constant, enduring, lasting)
2
cyclic(regular, routine, occasional, scheduled)
2
even
2
lengthy
2
long-life
2
longstanding(enduring, permanent, recurrent, perpetual)
1
coherent
1
consistent
1
fixed(stable, persistent, constant, hardened)
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APASmart Define. (2015). perennial thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/perennial/thesaurus/synonyms
ChicagoSmart Define. 2015. "perennial thesaurus" https://smartdefine.org/perennial/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, perennial thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/perennial/thesaurus/synonyms>.
MLASmart Define. "perennial thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/perennial/thesaurus/synonyms>