- Definitions|2
- Thesaurus|729
- Abbreviations|0
196 entries under adjective topic. ×
| round-the-clock(continue, continual) | |
| safe(good, strong, solid, steady) | |
| sedulous | |
| timeless | |
| abiding(set, clear, certain, fixed) | |
| around-the-clock | |
| boundless(certain, unchanging) | |
| dedicated(strong, firm, determined, steady) | |
| definite(good, clear, strong, solid) | |
| dyed-in-the-wool(certain, true, constant, reliable) | |
| enduring(set, clear, certain, steady) | |
| guaranteed(certain, flawless, unquestionable, undisputable) | |
| indomitable(strong, firm, determined, steady) | |
| interminable | |
| lasting(certain, fixed, reliable, continuous) | |
| nonstop | |
| ongoing | |
| plodding(strong, firm, determined, steady) | |
| plugging(strong, firm, determined, steady) | |
| positive(good, clear, strong, solid) |
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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> |