Headlong and Posthaste

Headlong

Headlong adverb - Without delay.
Usage example: had barely finished the last project when we went headlong into the next one

Posthaste and headlong are semantically related In some cases you can use "Posthaste" instead the word "Headlong" as an adverb or an adjective.

Posthaste

Posthaste adverb - With great speed.

Headlong and posthaste are semantically related in fast topic. Sometimes you can use "Headlong" instead the word "Posthaste" as an adverb or an adjective.
Cite this Source
Posthaste and Headlong. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/headlong/posthaste
Headlong & Posthaste. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/headlong/posthaste>.
Posthaste or Headlong. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/headlong/posthaste.
Google Ngram Viewer shows how "headlong" and "posthaste" have occurred on timeline