Fast
Fleetly
Fleetly adverb - With great speed.
Usage example: horses galloping fleetly across the plain
Fast and fleetly are semantically related in immediately topic. You can use "Fast" instead an adverb "Fleetly", if it concerns topics such as in the near future, very quickly.
Mutual synonyms
Cite this Source
Fleetly and Fast. (2016). Retrieved 2026, August 11, from https://thesaurus.plus/related/fast/fleetly
Fast & Fleetly. N.p., 2016. Web. 11 Aug. 2026. <https://thesaurus.plus/related/fast/fleetly>.
Fleetly or Fast. 2016. Accessed August 11, 2026. https://thesaurus.plus/related/fast/fleetly.
Google Ngram Viewer shows how "fast" and "fleetly" have occurred on timeline