Back when
But once and back when are semantically related in in the past topic. In some cases you can use "But once" instead an adverb phrase "Back when".
But once
Back when and but once are semantically related in in the past topic. Sometimes you can use "Back when" instead an adverb phrase "But once".
Mutual synonyms
Cite this Source
But once and Back when. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/back_when/but_once
Back when & But once. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/back_when/but_once>.
But once or Back when. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/back_when/but_once.
Google Ngram Viewer shows how "back when" and "but once" have occurred on timeline