At once
At once adverb - Without delay or hesitation; with no time intervening.
Post-haste and at once are semantically related In some cases you can use "Post-haste" instead an adverb phrase "At once".
Post-haste
Post-haste adverb - As fast as possible; with all possible haste.
At once and post-haste are semantically related in fast topic. You can use "At once" instead an adverb phrase "Post-haste", if it concerns topics such as immediately, as quickly as possible.
Mutual synonyms
Related pairs
- fast and at once
- fast and post-haste
- immediately and at once
- immediately and post-haste
- directly and at once
- directly and post-haste
- quickly and at once
- quickly and post-haste
- rapidly and at once
- rapidly and post-haste
- expeditiously and at once
- expeditiously and post-haste
- speedily and at once
- speedily and post-haste
Cite this Source
Post-haste and At once. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/at_once/post-haste
At once & Post-haste. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/at_once/post-haste>.
Post-haste or At once. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/at_once/post-haste.
