Synonyms for past

noun

1. Past time

   antiquity, long ago, past times, old times, years ago, good old days, good old times, ancient times, former times, days gone by, auld lang syne, yore, days of old, days of yore, yesterday.

   Antonyms future*, the present, tomorrow.

2. Past events

   knowledge, happenings, events; see history.

3. Concealed experiences

   secret affair, love affair, amour, hidden past, bronzed past, scarlet past, scarlet letter, scarlet A.

modified

1. Having occurred previously

   former, preceding, gone by, foregoing, elapsed, anterior, antecedent, prior.

2. No longer serving

   ex-, retired, earlier; see preceding.

not put it past someone