102 entries under constant topic. ×
| tenacious(adjective, strong, sound, secure, tough) | |
| well-founded(adjective, strong, sound, secure, tough) | |
| endless(adjective, regular, persistent, continuous) | |
| monotonous(adjective, quiet, soft, gentle, flat) | |
| unceasing(adjective, steady, regular, persistent) | |
| well-built(adjective, strong, sound, tough, firm) | |
| fastened(adjective, strong, secure, firm, solid) | |
| perdurable(adjective, tough, steady, fixed, sturdy) | |
| together(adjective, calm, sound, reasonable, firm) | |
| unending(adjective, regular, persistent, continuous) | |
| attached(adjective, secure, firm, true, fixed) | |
| close(adjective, strong, hard, firm, true) | |
| connected(adjective, dull, steady, regular, fixed) | |
| constrained(firm, true, fixed, steadfast) | |
| indestructible(adjective, tough, sturdy, enduring) | |
| inflexible(adjective, strong, secure, moderate, flat) | |
| interminable(adjective, steady, regular, persistent) | |
| perduring(tough, sturdy, enduring, lasting) | |
| set in stone(expression, adjective, idiom, secure, firm) | |
| true blue(expression, firm, true, fixed) |
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| APA | Smart Define. (2015). stable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/stable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stable thesaurus" https://smartdefine.org/stable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, stable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/stable/thesaurus/synonyms>. |
| MLA | Smart Define. "stable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/stable/thesaurus/synonyms> |