1
antiquated(adjective, last, original, dead, past)
1
antique(last, original, past, primitive, venerable)
1
archaic(adjective, last, original, dead, past)
1
beforetime(adverb, precede, archaism)
1
behind one(expression, adjective, late, old, past)
1
belated(adjective, dead, past, lost, previous)
1
cast-off(last, original, past, primitive, venerable)
1
crumbling(last, original, past, venerable, outdated)
1
dated(adjective, last, original, dead, past)
1
dead(adjective, past, lost, previous, former)
1
decayed(last, original, past, venerable, outdated)
1
defunct(adjective, dead, past, lost, previous)
1
departed(adjective, dead, old, past, lost)
1
done(last, original, past, venerable, outdated)
1
extinct(adjective, dead, past, lost, previous)
1
following
1
fore
1
forerunning
1
forgotten(adjective, dead, past, lost, previous)
1
forward
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APASmart Define. (2015). erstwhile thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/erstwhile/thesaurus/synonyms
ChicagoSmart Define. 2015. "erstwhile thesaurus" https://smartdefine.org/erstwhile/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, erstwhile thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/erstwhile/thesaurus/synonyms>.
MLASmart Define. "erstwhile thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/erstwhile/thesaurus/synonyms>