Directly
Directly adverb - In a direct line or course.
Once and directly are semantically related in immediately topic. In some cases you can use "Once" instead the word "Directly" as a conjunction or an adverb, when it comes to topics like as soon as.
Once
Once adverb - At an earlier or previous time.
Directly and once are semantically related in immediately topic. Sometimes you can use "Directly" instead an adverb "Once".
Mutual synonyms
Both words in one sentence
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However, once the final mission starts, you are immediately besieged on three sides by a force whose strength is directly proportional ton yours.
Source: Enemy Exchange Program - However, Huntsboys 88 and 89 get this a bit more directly: once they hear Rose's wish they immediately throw down their weapons and declare that they quit, and the spell passes them by harmlessly.
Source: Redemption Earns Life -
Chocoimo gets to do the intro once and directly addresses the viewer.
Source: Anime / Final Fantasy: Unlimited
Cite this Source
Once and Directly. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/directly/once
Directly & Once. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/directly/once>.
Once or Directly. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/directly/once.
Google Ngram Viewer shows how "directly" and "once" have occurred on timeline