- Definitions|2
- Thesaurus|729
- Abbreviations|0
95 entries under certain topic. ×
| reliable(adjective, honest, solid, true) | |
| infallible(adjective, sure, flawless, reliable) | |
| loyal(adjective, good, strong, honest, solid) | |
| constant(adjective, good, change, strong, continue) | |
| sure(adjective, true, definite, reliable) | |
| certain(adjective, strong, true, sure) | |
| unflagging(adjective, strong, continue, firm) | |
| dependable(adjective, good, strong, honest, solid) | |
| persistent(adjective, strong, continue, firm) | |
| trustworthy(adjective, good, strong, honest, solid) | |
| staunch(noun, adjective, good, strong, firm) | |
| steadfast(adjective, good, strong, honest, solid) | |
| unfaltering(adjective, set, clear, strong, firm) | |
| invariable(adjective, change, regular, fixed) | |
| steady(adjective, good, strong, firm, honest) | |
| inexhaustible(adjective, strong, continue, firm, energetic) | |
| true(adjective, good, strong, honest, solid) | |
| unerring(adjective, flawless, accurate, unquestionable) | |
| faithful(adjective, good, strong, honest, solid) | |
| same(adjective, change, set, regular) |
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| APA | Smart Define. (2016). unfailing thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unfailing/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "unfailing thesaurus" https://smartdefine.org/unfailing/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, unfailing thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unfailing/thesaurus/synonyms>. |
| MLA | Smart Define. "unfailing thesaurus" 3 March 2016. Web. 25 September 2026. <https://smartdefine.org/unfailing/thesaurus/synonyms> |