70 entries under noun topic. ×

24
former(adjective, order, time, back)
18
history(time, happen, antiquity, experiences)
14
yesteryear(time, antiquity, experiences)
12
quondam(adjective, original, old, previous)
11
yore(adjective, time)
11
antiquity(time, experiences, prehistory)
10
yesterday(time, today, antiquity, experiences)
8
antecedent(adjective, time, preceding, done)
6
future(adjective, present, turn, point)
6
precedent(adjective, time, preceding, done)
5
background
5
olden days(expression, adjective, idiom, old)
4
biography
4
days gone by(expression, idiom, time)
4
former times
4
life
4
lifetime
4
long ago(expression, adjective, time, old)
4
old times(expression, idiom)
4
past times(expression, idiom)
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APASmart Define. (2015). past thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/past/thesaurus/synonyms
ChicagoSmart Define. 2015. "past thesaurus" https://smartdefine.org/past/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, past thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/past/thesaurus/synonyms>.
MLASmart Define. "past thesaurus" 25 May 2015. Web. 28 September 2026. <https://smartdefine.org/past/thesaurus/synonyms>