AT ONCE Synonyms: 80 Similar and Opposite Words

at once

phrase

Definition of at once

as in concurrently

at one and the same time I have three papers due all at once.

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in now

without delay Call me at once when you get this message.

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of at once Eating too much fiber from candies at once can cause gas, bloating, or stomach discomfort, especially if you’re not used to it. — Amber Raiken, Verywell Health, 26 Aug. 2026 There is a pleasure in this capacity for fantasy, for viewing everything at once. — Literary Hub, 26 Aug. 2026 Administrators would much rather have small pockets of athletes winning state-court injunctions here and there than unleash 20,000-25,000 of them at once. — Stewart Mandel, New York Times, 26 Aug. 2026 The portrait that emerged from those conversations was of an organization attempting two reinventions at once. — Alex Heath, Time, 26 Aug. 2026 See All Example Sentences for at once

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atonal

at once

atone

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“At once.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/at%20once. Accessed 2 Sep. 2026.

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Synonyms of at once

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