634 entries under adjective topic. ×

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continual(direct, smooth, right, flat)
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deep-rooted(steady, fixed, even, constant)
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determined(good, strong, easy, flat)
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devoted(good, strong, honest, solid)
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flat(calm, quiet, strong, direct)
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hardy(strong, sound, tough, solid)
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hearty(strong, sound, complete, tough)
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level(quiet, direct, smooth, right)
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long-lasting(tough, sturdy, constant, enduring)
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motionless(calm, dull, quiet, strong)
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orderly(calm, smooth, steady, temperate)
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persisting(persistent, continuous, endless, relentless)
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poised(calm, quiet, easy, firm)
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quiet(calm, dull, secure, soft)
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sensible(sound, reasonable, moderate, firm)
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smooth(calm, quiet, direct, right)
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still(calm, dull, quiet, secure)
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systematic(calm, smooth, steady, temperate)
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tenacious(strong, sound, secure, tough)
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unbroken(calm, quiet, direct, smooth)
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APASmart Define. (2015). stable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/stable/thesaurus/synonyms
ChicagoSmart Define. 2015. "stable thesaurus" https://smartdefine.org/stable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, stable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/stable/thesaurus/synonyms>.
MLASmart Define. "stable thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/stable/thesaurus/synonyms>