Erstwhile
Erstwhile adjective - Having been such at some previous time.
Pioneer
Pioneer adjective - Coming before all others in time or order.
Erstwhile and pioneer are semantically related. Sometimes you can use "Erstwhile" instead an adjective "Pioneer".
Nearby Words: pioneering, pioneered
Mutual synonyms
Cite this Source
Pioneer and Erstwhile. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/erstwhile/pioneer
Erstwhile & Pioneer. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/erstwhile/pioneer>.
Pioneer or Erstwhile. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/erstwhile/pioneer.
Google Ngram Viewer shows how "erstwhile" and "pioneer" have occurred on timeline