20
erstwhile(adjective, last, original, dead, late)
19
former(adjective, adverb, order, time, last)
16
past(adjective, original, old, previous, former)
16
sometime(adjective, adverb, last, original, dead)
14
previous(adjective, adverb, last, dead, late)
13
late(adjective, last, original, dead, old)
13
old(adjective, last, late, past, previous)
11
onetime(adjective, last, original, primitive, venerable)
11
prior(adjective, late, old, past, previous)
10
ancient(adjective, dead, late, old, past)
10
one-time(adjective, last, dead, late, old)
10
whilom(adjective, precede)
9
once(adjective, adverb, last, original, late)
8
bygone(adjective, last, original, late, old)
8
preceding(adjective, late, old, past, previous)
7
olden(adjective, original, dead, late, old)
6
recent(adjective, late, old, past, previous)
5
Old
5
earlier(adjective, adverb, late, old, past)
4
extinct(adjective, dead, past, lost, previous)
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APASmart Define. (2015). quondam thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/quondam/thesaurus/synonyms
ChicagoSmart Define. 2015. "quondam thesaurus" https://smartdefine.org/quondam/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, quondam thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/quondam/thesaurus/synonyms>.
MLASmart Define. "quondam thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/quondam/thesaurus/synonyms>