| in all ages(expression, idiom, perpetuity) | |
| incalculability | |
| other world(noun, expression, age, future, infinity) | |
| permanence(noun, perpetuity) | |
| perpetual(adjective, stable, constant, enduring, lasting) | |
| persistent(adjective, stable, constant, enduring, lasting) | |
| repeatedly(adverb, relentless, unremitting, on, endlessly) | |
| termlessness | |
| abiding(stable, constant, enduring, lasting, permanent) | |
| dateless(lasting, permanent, everlasting, unending, undying) | |
| develop | |
| diurnal(adjective, stable, constant, vast, enduring) | |
| durable(stable, constant, enduring, lasting, permanent) | |
| duration | |
| e're | |
| enduring(adjective, stable, constant, lasting, infinite) | |
| era | |
| eternality(noun, endlessness) | |
| ever and again(expression, idiom) | |
| ever and anon(expression, idiom) |
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| APA | Smart Define. (2015). forever thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/forever/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "forever thesaurus" https://smartdefine.org/forever/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, forever thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/forever/thesaurus/synonyms>. |
| MLA | Smart Define. "forever thesaurus" 15 December 2015. Web. 24 September 2026. <https://smartdefine.org/forever/thesaurus/synonyms> |