9
since(adverb, preposition, conjunction, time, past)
8
back(adverb, past)
8
past(adjective, past, preceding, done)
7
before(adverb, past, elsewhere, precendently)
7
gone(adverb, past, elsewhere, precendently)
6
bygone(adjective, past)
6
formerly(adverb, the past)
5
earlier
5
previously
4
agone
4
back when(expression, idiom, adverb, past, elsewhere)
4
former(noun, adjective, past)
4
in the past(verb, expression, idiom, adverb, phrasal verb)
4
over(adverb, the past)
4
previous(adjective, past)
3
gone-by
3
gone by(verb, expression, adjective, adverb, phrasal verb)
3
old(adjective, past)
3
time was(expression, idiom, adverb, past, elsewhere)
3
yore(noun, adjective, past)
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APASmart Define. (2015). ago thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/ago/thesaurus/synonyms
ChicagoSmart Define. 2015. "ago thesaurus" https://smartdefine.org/ago/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, ago thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/ago/thesaurus/synonyms>.
MLASmart Define. "ago thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/ago/thesaurus/synonyms>