634 entries under adjective topic. ×
| undeviating(quiet, strong, direct, smooth) | |
| unruffled(calm, quiet, smooth, soft) | |
| unswerving(firm, solid, fixed, resolute) | |
| unvaried | |
| vigorous(strong, sound, complete, tough) | |
| well-founded(strong, sound, secure, tough) | |
| chronic(persistent, continuous, endless, relentless) | |
| continuing(fixed, unaffected, lasting, permanent) | |
| controlled(reasonable, moderate, restrained, cautious) | |
| cool(calm, quiet, sound, reasonable) | |
| dense(close, strong, hard, firm) | |
| endless(regular, persistent, constant, continuous) | |
| equitable(reasonable, just, impartial) | |
| eternal(wild, steady, regular, persistent) | |
| formidable | |
| frozen(calm, quiet, hard, still) | |
| hale(strong, sound, complete, tough) | |
| imperturbable(calm, smooth, firm, solid) | |
| inactive(action, calm, mild, still) | |
| incessant(steady, regular, persistent, even) |
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| APA | Smart Define. (2015). stable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/stable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stable thesaurus" https://smartdefine.org/stable/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, stable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/stable/thesaurus/synonyms>. |
| MLA | Smart Define. "stable thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/stable/thesaurus/synonyms> |