8
bypast(adjective, late, old, past, previous)
8
defunct(adjective, tired, past, lost, obsolete)
8
foregone(adjective, the past)
8
passé(noun, adjective, plain, new, last)
8
previous(adjective, last, late, old, past)
8
quondam(noun, adjective, last, original, late)
7
curiosity(noun, item, antique, trinket, oddity)
7
dated(adjective, plain, new, last, original)
6
ago(adjective, past)
6
lost(adjective, past, destroyed, extinct)
6
of old(expression, adjective, idiom, last, original)
6
out-of-date(adjective, new, last, original, dead)
6
over(adjective, late, old, past, finished)
6
venerable(original, old, primitive, outdated, obsolete)
5
dowdy(adjective, plain, new, odd, old)
5
hoary
5
oldfangled(adjective, last, original, odd, old)
5
once(adjective, adverb, last, original, late)
5
outmoded(adjective, new, last, original, odd)
5
sometime(adjective, last, original, late, old)
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APASmart Define. (2015). bygone thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/bygone/thesaurus/synonyms
ChicagoSmart Define. 2015. "bygone thesaurus" https://smartdefine.org/bygone/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, bygone thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/bygone/thesaurus/synonyms>.
MLASmart Define. "bygone thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/bygone/thesaurus/synonyms>