Posthaste and Quickest

Posthaste

Posthaste adverb - With great speed.

Quickest and posthaste are semantically related In some cases you can replace term "Quickest" with "Posthaste", this adverbs are similar.

Quickest

Quickest adverb - Most quickly.

Posthaste and quickest are semantically related in fast topic. Sometimes you can use "Posthaste" instead an adjective "Quickest".
Cite this Source
Quickest and Posthaste. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/posthaste/quickest
Posthaste & Quickest. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/posthaste/quickest>.
Quickest or Posthaste. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/posthaste/quickest.
Google Ngram Viewer shows how "posthaste" and "quickest" have occurred on timeline