24 entries under the past topic. ×

10
extinct(adjective, dead, past, lost, previous)
9
bygone(adjective, out, past, oblivion)
9
past(adjective, out, preceding, done)
8
gone(adjective, dead, out, past, lost)
8
elapsed(verb, adjective, forgot)
5
irrecoverable
5
antebellum
5
blown over(verb, expression, adjective, phrasal verb, out)
5
expired
5
lapsed(adjective, out)
5
obsolete
3
antediluvian
3
exploded
3
gone by(verb, expression, adjective, phrasal verb, dead)
3
run out(verb, expression, phrasal verb)
2
over
2
foregone
2
has-been
2
no more(expression, idiom)
2
passed away(verb, phrasal verb)
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APASmart Define. (2015). forgotten thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/forgotten/thesaurus/synonyms
ChicagoSmart Define. 2015. "forgotten thesaurus" https://smartdefine.org/forgotten/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, forgotten thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/forgotten/thesaurus/synonyms>.
MLASmart Define. "forgotten thesaurus" 30 October 2015. Web. 28 September 2026. <https://smartdefine.org/forgotten/thesaurus/synonyms>