- Definitions|2
- Thesaurus|729
- Abbreviations|0
196 entries under adjective topic. ×
| devoted(good, strong, firm, honest) | |
| eternal(continue, certain, steady, fixed) | |
| everlasting | |
| fast(trustworthy, faithful) | |
| fixed(set, clear, certain, regular) | |
| incessant(strong, continue, firm, determined) | |
| perennial(enduring, perpetual) | |
| predictable(good, strong, solid, steady) | |
| sure-fire(informal, certain, flawless, unquestionable) | |
| surefire(certain, reliable, trustworthy, unquestionable) | |
| unchanged(fixed, even, rigid, uniform) | |
| unending | |
| absolute(certain, unchanging) | |
| honest(open, sensible, sure, reliable) | |
| industrious | |
| never-failing(set, clear, certain, sure) | |
| patient(strong, firm, determined, steady) | |
| perseverant | |
| regular(set, steady, persistent, even) | |
| rigid(set, regular, fixed, constant) |
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| APA | Smart Define. (2016). unfailing thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unfailing/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "unfailing thesaurus" https://smartdefine.org/unfailing/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2016, unfailing thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unfailing/thesaurus/synonyms>. |
| MLA | Smart Define. "unfailing thesaurus" 3 March 2016. Web. 29 September 2026. <https://smartdefine.org/unfailing/thesaurus/synonyms> |