Formerly
Once only
Formerly and once only are semantically related in in the past topic. You can use "Formerly" instead an adverb phrase "Once only".
Mutual synonyms
Related pairs
Cite this Source
Once only and Formerly. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/formerly/once_only
Formerly & Once only. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/formerly/once_only>.
Once only or Formerly. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/formerly/once_only.
Google Ngram Viewer shows how "formerly" and "once only" have occurred on timeline