| infinity(time, stretch, period, interval, while) | |
| instance | |
| instant(noun, time, present, turn, position) | |
| interim | |
| invariability | |
| invariableness | |
| inveteracy | |
| juncture(noun, time, present, turn, moment) | |
| lacuna(time, period, interval) | |
| lasting(adjective, diuturnity) | |
| length of time(expression, idiom) | |
| lengthiness | |
| life cycle(noun, expression, course, lifetime) | |
| life span(noun, expression, present, turn, point) | |
| linearity | |
| loftiness | |
| long-lastingness | |
| long-livedness | |
| longitude | |
| longness |
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Duration on
Power Thesaurus
| APA | Smart Define. (2015). duration thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/duration/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "duration thesaurus" https://smartdefine.org/duration/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, duration thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/duration/thesaurus/synonyms>. |
| MLA | Smart Define. "duration thesaurus" 15 July 2015. Web. 21 September 2026. <https://smartdefine.org/duration/thesaurus/synonyms> |