18
erstwhile(adjective, adverb, last, original, dead)
17
former(adjective, adverb, order, time, last)
16
quondam(adjective, adverb, last, original, dead)
11
eventually(expression, adverb, time, moment, even)
11
old(adjective, last, late, past, previous)
11
once(expression, adjective, adverb, time, moment)
11
past(adjective, original, old, previous, outdated)
10
late(adjective, adverb, last, original, dead)
10
previous(adjective, adverb, last, dead, late)
9
onetime(adjective, last, original, past, primitive)
9
someday(adverb, even, yet, already, finally)
8
in some cases
8
whilom(adjective, precede)
6
bygone(adjective, last, original, late, old)
6
occasionally(expression, adverb, time, moment, rare)
6
one-time(adjective, last, dead, late, old)
6
one day(expression, idiom, adverb, late, yet)
6
prior(adjective, late, old, past, previous)
6
sometimes(expression, adverb, time, moment, rare)
5
ancient(adjective, dead, late, old, past)
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APASmart Define. (2015). Sometime thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sometime/thesaurus/synonyms
ChicagoSmart Define. 2015. "Sometime thesaurus" https://smartdefine.org/sometime/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, Sometime thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sometime/thesaurus/synonyms>.
MLASmart Define. "Sometime thesaurus" 19 June 2015. Web. 20 September 2026. <https://smartdefine.org/sometime/thesaurus/synonyms>