92 entries under certain topic. ×
| cool(adjective, good, great, pleasant, reasonable) | |
| unshakable(adjective, strong, hard, secure, tough) | |
| irrefutable(adjective, sound, reasonable, material) | |
| persistent(adjective, strong, tough, firm) | |
| decided(adjective, serious, resolute, persistent) | |
| definite(adjective, good, strong, correct, easy) | |
| resolute(adjective, calm, strong, secure, tough) | |
| unchanging(adjective, severe, firm, harsh) | |
| unfailing(adjective, good, strong, open, sensible) | |
| absolute(adjective, strong, physical, material) | |
| determined(adjective, strong, severe, definite) | |
| enduring(adjective, calm, strong, sound, tough) | |
| loyal(adjective, good, strong, firm, honest) | |
| settled(adjective, strong, secure, easy, firm) | |
| abiding(adjective, calm, strong, firm) | |
| assured(strong, definite, sure, certainty) | |
| balanced(adjective, calm, strong, easy, firm) | |
| conclusive(adjective, strong, sound, complete, reasonable) | |
| continuing(familiar, reliable, established, trustworthy) | |
| imperturbable(adjective, firm, stable, fixed) |
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| APA | Smart Define. (2016). solid thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/solid/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "solid thesaurus" https://smartdefine.org/solid/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, solid thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/solid/thesaurus/synonyms>. |
| MLA | Smart Define. "solid thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/solid/thesaurus/synonyms> |