Close upon
On and close upon are semantically related. In some cases you can use "On" instead an adverb phrase "Close upon".
On
On adverb - Toward a point ahead in space or time.
Close upon and on are semantically related. Sometimes you can use "Close upon" instead an adverb "On".
Mutual synonyms
Cite this Source
On and Close upon. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/close_upon/on
Close upon & On. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/close_upon/on>.
On or Close upon. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/close_upon/on.
Google Ngram Viewer shows how "close upon" and "on" have occurred on timeline