| grown old(expression, odd, old, primitive, unfashionable) | |
| had it | |
| has-beens | |
| in oblivion(expression, adjective, dead, past, lost) | |
| in vogue | |
| indolent | |
| inoperative(dull, cold, tired, lifeless, lost) | |
| inorganic(adjective, lifeless, organic, nonliving) | |
| insensate(dull, cold, lifeless, nonliving, inorganic) | |
| kaputt | |
| kayoed | |
| lacking(split, away, finished, absent, left) | |
| left(split, away, lacking, finished, absent) | |
| lost to sight(expression, idiom) | |
| lost to view(expression, idiom) | |
| mineral(dull, cold, lifeless, nonliving, inorganic) | |
| motionless(adjective, dull, cold, lifeless, nonliving) | |
| moved(split, away, lacking, finished, absent) | |
| musty(adjective, odd, old, primitive, unfashionable) | |
| neglected(adjective, odd, old, primitive, unfashionable) |
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| APA | Smart Define. (2016). extinct thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/extinct/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "extinct thesaurus" https://smartdefine.org/extinct/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, extinct thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/extinct/thesaurus/synonyms>. |
| MLA | Smart Define. "extinct thesaurus" 10 February 2016. Web. 21 September 2026. <https://smartdefine.org/extinct/thesaurus/synonyms> |