Synonyms|396Antonyms|89|Broader|6Narrower|5Related|200
2
at intervals
2
at some time(expression, idiom)
2
away back(expression, adjective, adverb, late, past)
2
back when(expression, adjective, adverb, late, old)
2
before now(expression, idiom, adverb, now, earlier)
2
beforehand
2
beforetime(adverb, earlier, precede, archaism)
2
conclusively
2
decidedly
2
definitely
2
directly
2
down memory lane(expression, adjective, idiom, late, old)
2
erewhile(adverb, earlier, then, before, erstwhile)
2
finally
2
for good
2
immemorial(last, original, past, primitive, venerable)
2
in a jiffy(noun, expression, idiom)
2
in a trice(noun, expression, idiom)
2
in a wink(noun, expression, idiom)
2
just this once(expression, idiom)
For more, visit Once on Power Thesaurus
10 years ago|8.8k views|share |citing 
APASmart Define. (2016). once thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/once/thesaurus/synonyms
ChicagoSmart Define. 2016. "once thesaurus" https://smartdefine.org/once/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, once thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/once/thesaurus/synonyms>.
MLASmart Define. "once thesaurus" 30 March 2016. Web. 20 September 2026. <https://smartdefine.org/once/thesaurus/synonyms>