Once Synonyms

30 once synonyms include One time, At one time, A single time, Formerly, Previously, In the past, On one occasion, Back then, Sometime, and At one point. Once is an adverb, and its antonyms are twice and many times. Here are some additional synonyms for "once" with example sentences.

Another word for Once

30 other ways to say once.

  • Sometime  
  •  
  • Previously  
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  • On one occasion  
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  • One time  
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  • Once upon a time  
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  • Long since  
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  • Long ago  
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  • In the past  
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  • In the old days  
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  • In previous years  
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  • In history  
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  • In former times  
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  • In earlier days  
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  • In days gone by  
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  • In bygone days  
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  • Historically  
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  • Formerly  
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  • Former  
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  • Erstwhile  
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  • Earlier  
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  • Before now  
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  • Back then  
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  • Back in the day  
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  • A while ago  
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  • At some point  
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  • At one time  
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  • At one point  
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  • At a time  
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  • At an earlier time  
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  • A single time  
  •  

Use once in a Sentence

Call me once you finish everything.

Every achiever was once a beginner.

Her appearance surprised everyone at once.

I zonked quickly once I hit the pillow.

once you're ready, let's begin.

She smiled once she arrived.

The tree blooms once every five years.