Find Antonyms

once Antonyms

Opposite of once

Because the opposite of once shifts with each meaning, the 15 antonyms and opposite words below are separated across 3 exact definitions and ranked by contrast strength.
JUMP TO:

• adverb (Context 1)

On one occasion or for one time only.

Usage Example

"The committee meets only never a month to review new proposals."

Strongest
never
repeatedly
Strong
frequently
often
continually
always

• conjunction (Context 2)

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

Usage Example

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

Strongest
before
Strong
until

• adverb (Context 3)

At some indefinite time in the past; formerly.

Usage Example

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

Strongest
now
currently
presently
nowadays
Strong
today
hereafter
henceforth

Similar words to once

Words similar to once shift depending on context. Common synonyms include:

in the past
formerly
as soon as
when
at one time
after
previously
before
See all synonyms of once

• Nearby Words

on
onboard
onboarding
once
oncoming
one
oneness

Cite this Entry

Wordmom. (2026). Antonyms for Once. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/once
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.