| lasting(adjective, permanent, lifelong, diurnal) | |
| permanent(adjective, lasting, lifelong, diurnal) | |
| eternal(adjective, permanent, lifelong, diurnal) | |
| everlasting(adjective, permanent, lifelong, diurnal) | |
| forever(permanent, lifelong, diurnal, ceaselessly) | |
| in for the long haul(expression, idiom, permanent, lifelong) | |
| inexpungible(permanent, lifelong, diurnal, ceaselessly) | |
| longstanding(permanent, lifelong, diurnal, ceaselessly) | |
| till the cows come home(expression, idiom, permanent, lifelong) |
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| APA | Smart Define. (2016). long-term thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/long-term/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "long-term thesaurus" https://smartdefine.org/long-term/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, long-term thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/long-term/thesaurus/synonyms>. |
| MLA | Smart Define. "long-term thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/long-term/thesaurus/synonyms> |