| forever and ever(noun, expression, idiom, years) | |
| interminable(adjective, slow, late, time-consuming) | |
| lengthy(adjective, slow, boring, tedious, late) | |
| long time(noun, expression, years) | |
| month of Sundays(noun, expression, idiom, eternity) | |
| permanent(adjective, constant, lasting) | |
| protracted(adjective, slow, boring, tedious, late) | |
| rambling(boring, tedious) | |
| right smart spell(noun, expression, idiom, eternity) | |
| sempiternity(noun, eternity) | |
| stable(adjective, constant, enduring, lasting, perpetual) | |
| tedious(boring, rambling) | |
| time immemorial(noun, expression, eternity) | |
| time out of mind(noun, expression, idiom, eternity) | |
| year(noun, time) | |
| years | |
| years on end(noun, expression, idiom, eternity) |
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| APA | Smart Define. (2011). forever and a day thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/forever_and_a_day/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "forever and a day thesaurus" https://smartdefine.org/forever_and_a_day/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2011, forever and a day thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/forever_and_a_day/thesaurus/synonyms>. |
| MLA | Smart Define. "forever and a day thesaurus" 24 May 2011. Web. 30 September 2026. <https://smartdefine.org/forever_and_a_day/thesaurus/synonyms> |