1
in former times(expression, idiom, adverb, earlier, then)
1
in olden days(expression, idiom, adverb)
1
in one case(expression, idiom, adverb)
1
in the old days(expression, adjective, idiom, adverb, past)
1
in the olden days(expression, adjective, idiom, adverb, late)
1
in the singular(expression, idiom)
1
in time past
1
in times gone by(expression, adjective, idiom, adverb, past)
1
individually
1
itinerary
1
latter(adjective, late, old, past, previous)
1
latter-day(adjective, late, old, past, previous)
1
long-ago(adjective, late, old, past, previous)
1
moth-eaten(last, original, past, venerable, outdated)
1
no longer(expression, idiom, the past)
1
no matter when(expression, idiom)
1
obsolete(adjective, last, original, previous, other)
1
old-fashioned(last, original, past, venerable, outdated)
1
old-time(last, original, past, primitive, venerable)
1
oldfangled(adjective, last, original, primitive, venerable)
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APASmart Define. (2016). once thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/once/thesaurus/synonyms
ChicagoSmart Define. 2016. "once thesaurus" https://smartdefine.org/once/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, once thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/once/thesaurus/synonyms>.
MLASmart Define. "once thesaurus" 30 March 2016. Web. 22 September 2026. <https://smartdefine.org/once/thesaurus/synonyms>