| disapproved(adjective, odd, old, primitive, unfashionable) | |
| discontinue | |
| disintegrated(split, away, lacking, finished, absent) | |
| displaced(split, away, lacking, finished, absent) | |
| dissipated(split, dead, away, lacking, finished) | |
| dissolve(verb, inexistence) | |
| dissolved(split, away, lacking, finished, absent) | |
| down memory lane(expression, adjective, idiom, dead, past) | |
| dried up(expression, split, away, lacking, finished) | |
| erased(adjective, forgotten) | |
| erstwhile(adjective, dead, past, lost, previous) | |
| examine | |
| expunged | |
| extinction | |
| extinguish | |
| former(adjective, dead, late, past, lost) | |
| gone-by | |
| gone away | |
| gone glimmering | |
| gone out |
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| APA | Smart Define. (2016). extinct thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/extinct/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "extinct thesaurus" https://smartdefine.org/extinct/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, extinct thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/extinct/thesaurus/synonyms>. |
| MLA | Smart Define. "extinct thesaurus" 10 February 2016. Web. 20 September 2026. <https://smartdefine.org/extinct/thesaurus/synonyms> |