617 entries under adjective topic. ×

18
impregnable(strain, firmness, labour, hardiness)
18
non-fluctuating(strain, firmness, labour, hardiness)
18
tight(strain, firmness, labour, hardiness)
17
resolute(calm, close, strong, secure)
16
devoted(good, close, strong, kind)
14
non-stop
14
unfailing(good, change, strong, continue)
14
abiding(calm, strong, secure, tough)
14
determined(good, strong, flat, firm)
14
habitual(reasonable, common, ordinary, usual)
14
perennial(stable, continuous, stability, enduring)
14
persevering(strong, flat, firm, certain)
14
relentless(continue, firm, determined, steady)
14
unflagging(strong, firm, certain, determined)
13
even(adverb, calm, strong, sound)
13
never-ending(steady, continuous, endless, infinite)
13
unchangeable(calm, strong, secure, moderate)
13
unfaltering(strong, firm, solid, certain)
13
unswerving(close, strong, correct, firm)
12
frequent(common, usual, steady, regular)
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APASmart Define. (2016). constant thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/constant/thesaurus/synonyms
ChicagoSmart Define. 2016. "constant thesaurus" https://smartdefine.org/constant/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, constant thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/constant/thesaurus/synonyms>.
MLASmart Define. "constant thesaurus" 12 February 2016. Web. 23 September 2026. <https://smartdefine.org/constant/thesaurus/synonyms>