- Definitions|2
- Thesaurus|5k
- Abbreviations|0
74 entries under stable topic. ×
| secure(adjective, calm, quiet, strong, hard) | |
| vigorous(adjective, strong, sound, complete, tough) | |
| sure(adjective, calm, strong, secure, continue) | |
| staunch(adjective, calm, strong, sound, secure) | |
| unshakable(adjective, strong, hard, continue, solid) | |
| sober(adjective, firm, solid, big, heavy) | |
| tenacious(adjective, strong, sound, tough, fit) | |
| fixed(adjective, strong, hard, sound, tough) | |
| resolute(adjective, calm, strong, secure, firm) | |
| set(adjective, calm, strong, hard, secure) | |
| balanced(adjective, calm, strong, secure, firm) | |
| certain(adjective, firm, solid, physical, material) | |
| cool(adjective, calm, firm, solid, informal) | |
| imperturbable(adjective, firm, solid, fixed) | |
| intense(adjective, firm, solid, enthusiastic, vigorous) | |
| regular(adjective, firm, solid, fixed) | |
| safe(adjective, calm, strong, complete, secure) | |
| staid(adjective, firm, solid, big, heavy) | |
| unwavering(adjective, calm, strong, secure, firm) | |
| abiding(adjective, calm, strong, secure, tough) |
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| APA | Smart Define. (2016). substantial thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/substantial/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "substantial thesaurus" https://smartdefine.org/substantial/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, substantial thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/substantial/thesaurus/synonyms>. |
| MLA | Smart Define. "substantial thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/substantial/thesaurus/synonyms> |