Fleetingly
Fast and fleetingly are semantically related. In some cases you can use "Fast" instead an adverb "Fleetingly".
Fast
Fast adverb - With great speed.
Fleetingly and fast are semantically related. Sometimes you can replace term "Fleetingly" with "Fast", this adverbs are similar.
Cite this Source
Fast and Fleetingly. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/fleetingly/fast
Fleetingly & Fast. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/fleetingly/fast>.
Fast or Fleetingly. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/fleetingly/fast.
Google Ngram Viewer shows how "fleetingly" and "fast" have occurred on timeline