- Definitions|2
- Thesaurus|618
- Abbreviations|0
31 entries under permanent topic. ×
| perdurable(continuous, enduring, lasting, eternal) | |
| forever(enduring, lasting, everlasting, perpetual) | |
| in for the long haul(expression, enduring, lasting, perpetual) | |
| inexhaustible(long-term, lifelong) | |
| inexpungible(long-term, lifelong) | |
| longstanding(recurrent, perpetual, long-term, lifelong) | |
| old(recurrent, perpetual, long-term, lifelong) | |
| ongoing(long-term, lifelong) | |
| persisting(long-term, lifelong) | |
| stable(adjective, enduring, lasting, perpetual) | |
| till the cows come home(expression, idiom, long-term, lifelong) |
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| APA | Smart Define. (2016). undying thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/undying/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "undying thesaurus" https://smartdefine.org/undying/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, undying thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/undying/thesaurus/synonyms>. |
| MLA | Smart Define. "undying thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/undying/thesaurus/synonyms> |