Find Synonyms

once Synonyms

Another word for once

Choosing another word for once depends on context, so the 19 synonyms and similar words below are separated across 4 exact definitions and ranked by match strength.
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• adverb (Context 1)

On one occasion or for one time only.

Usage Example

"The committee meets only singly a month to review new proposals."

Strong
singly

• conjunction (Context 2)

As soon as; when or after a specified condition has been met.

Usage Example

"when the final data is verified, the research team will publish the findings."

Strongest
when
as soon as
after
Strong
the moment
the instant

• adverb (Context 3)

At some indefinite time in the past; formerly.

Usage Example

"This quiet valley was formerly the site of a bustling medieval market town."

Strongest
formerly
in the past
at one time
previously
Strong
earlier
before
heretofore
erstwhile
long ago
historically

• noun (Context 4)

A single occasion or instance (used chiefly in prepositional phrases such as 'for once' or 'this once').

Usage Example

"For time, the train arrived at the station several minutes ahead of schedule."

Strong
time
occasion
instance

Opposites of once

The opposite of once shifts depending on context. Common opposites include:

never
now
currently
nowadays
presently
before
repeatedly
frequently
See all opposites of once

• Nearby Words

onager
onboard
onboarding
once
oncidium
oncoming
one

Cite this Entry

Wordmom. (2026). Synonyms for Once. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/once
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