Fleetly
Fleetly adverb - With great speed.
Usage example: horses galloping fleetly across the plain
Posthaste and fleetly are semantically related in immediately topic. In some cases you can use "Posthaste" instead an adverb "Fleetly", when it comes to topics like speedily, very fast, in the near future.
Posthaste
Posthaste adverb - With great speed.
Usage example: ran posthaste for the doctor
Mutual synonyms
Related pairs
Cite this Source
Posthaste and Fleetly. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/fleetly/posthaste
Fleetly & Posthaste. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/fleetly/posthaste>.
Posthaste or Fleetly. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/fleetly/posthaste.
Google Ngram Viewer shows how "fleetly" and "posthaste" have occurred on timeline