Upon which
When and upon which are semantically related. In some cases you can replace term "When" with "Upon which", this terms are similar.
When
Upon which and when are semantically related. Sometimes you can replace phrase "Upon which" with "When", this terms are similar.
Mutual synonyms
Cite this Source
When and Upon which. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/upon_which/when
Upon which & When. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/upon_which/when>.
When or Upon which. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/upon_which/when.
Google Ngram Viewer shows how "upon which" and "when" have occurred on timeline