| expired | |
| ignored(verb, neglected) | |
| lapsed(adjective, out, the past) | |
| obsolete | |
| unremembered(adjective, out, oblivion) | |
| archaic(adjective, dead, past, lost, previous) | |
| unrequited | |
| vanished(adjective, dead, past, lost, previous) | |
| absolved(verb, forgave) | |
| acquitted(verb, forgave) | |
| ancient(adjective, dead, past, lost, previous) | |
| antediluvian(adjective, the past) | |
| condoned(verb, forgave) | |
| dated(adjective, dead, past, lost, previous) | |
| erstwhile(adjective, dead, past, lost, previous) | |
| excused(verb, forgave) | |
| exonerated(verb, forgave) | |
| exploded | |
| forget | |
| forgiven(verb, forgave) |
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| APA | Smart Define. (2015). forgotten thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/forgotten/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "forgotten thesaurus" https://smartdefine.org/forgotten/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, forgotten thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/forgotten/thesaurus/synonyms>. |
| MLA | Smart Define. "forgotten thesaurus" 30 October 2015. Web. 22 September 2026. <https://smartdefine.org/forgotten/thesaurus/synonyms> |