At once
At once adverb - Without delay or hesitation; with no time intervening.
Timely and at once are semantically related. in immediately topic. In some cases you can use "Timely" instead the phrase "At once" as an adverb or an adjective.
Mutual synonyms
Cite this Source
Timely and At once. (2016). Retrieved 2026, July 27, from https://thesaurus.plus/related/at_once/timely
At once & Timely. N.p., 2016. Web. 27 Jul. 2026. <https://thesaurus.plus/related/at_once/timely>.
Timely or At once. 2016. Accessed July 27, 2026. https://thesaurus.plus/related/at_once/timely.
Google Ngram Viewer shows how "at once" and "timely" have occurred on timeline