Immediately
Immediately adverb - Without delay.
Simultaneously
Simultaneously adverb - At one and the same time.
Immediately is an antonym for simultaneously.
Nearby Words: simultaneous, simultaneity
Both words in one sentence
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In the second episode of Sleepy Hollow's second season, Abby and Ichabod conjure up a horseman of their own who immediately takes on the Horsemen of Death and War simultaneously.
Source: Cool vs. Awesome -
Villains to not just one but two other contestants, Sandra and Jerri, simultaneously, which ensured JT was immediately sent home, and that the Villains would take control.
Source: Series / Survivor - Of course, this simultaneously looked like Vomiting Kermit ejaculated on the Masturbating Bear, something which Conan immediately realized and was embarrassed about.
Cite this Source
Simultaneously and Immediately. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/immediately/simultaneously
Immediately & Simultaneously. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/immediately/simultaneously>.
Simultaneously or Immediately. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/immediately/simultaneously.
Google Ngram Viewer shows how "immediately" and "simultaneously" have occurred on timeline