Erstwhile
Erstwhile adverb - At an earlier or previous time.
Once only
Erstwhile and once only are semantically related in in the past topic. Sometimes you can use "Erstwhile" instead an adverb phrase "Once only".
Mutual synonyms
Related pairs
Cite this Source
Once only and Erstwhile. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/erstwhile/once_only
Erstwhile & Once only. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/erstwhile/once_only>.
Once only or Erstwhile. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/erstwhile/once_only.
Google Ngram Viewer shows how "erstwhile" and "once only" have occurred on timeline