1
latter-day(adjective, late, old, past, previous)
1
long-ago(adjective, late, old, past, previous)
1
olden(adjective, late, old, past, previous)
1
on one occasion(expression, idiom, adverb, late, earlier)
1
once only(expression, adverb, late, earlier, before)
1
one(adverb, late, earlier, then, before)
1
one-time(adjective, late, old, past, previous)
1
one time before(expression, idiom, adverb, late, earlier)
1
one time previously(expression, idiom, adverb, late, earlier)
1
only one time(expression, idiom, adverb, late, earlier)
1
over(adjective, late, old, past, previous)
1
preceding(adjective, late, old, past, previous)
1
previous(adjective, late, old, past, early)
1
prior(adjective, late, old, past, previous)
1
recent(adjective, late, old, past, previous)
1
retired(adjective, late, old, past, previous)
1
since
1
single time(expression, adverb, late, earlier, before)
1
this time(expression, adverb, late, earlier, before)
1
up to now(expression, idiom, adverb, then, yet)
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APASmart Define. (2015). back when thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/back_when/thesaurus/synonyms
ChicagoSmart Define. 2015. "back when thesaurus" https://smartdefine.org/back_when/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, back when thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/back_when/thesaurus/synonyms>.
MLASmart Define. "back when thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/back_when/thesaurus/synonyms>