Under
Under adverb - In or to a lower place.
Upon and under are semantically related in of topic. In some cases you can use "Upon" instead a preposition "Under", when it comes to topics like per.
Upon
Upon preposition - In or into contact with.
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Synonyms for Upon
Under and upon are semantically related in of topic. Sometimes you can use "Under" instead a preposition "Upon", if it concerns topics such as per.
Cite this Source
Upon and Under. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/under/upon
Under & Upon. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/under/upon>.
Upon or Under. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/under/upon.
Google Ngram Viewer shows how "under" and "upon" have occurred on timeline