Against
Against preposition - In or into contact with.
Usage example: unwittingly rubbed his leg against some poison ivy
Upon is a synonym for against in of topic. In some cases you can use "Upon" instead the word "Against" as a preposition or an adverb. popular alternative
Upon
Upon preposition - In or into contact with.
Usage example: leaned upon the desk
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Synonyms for Upon
Against is a synonym for upon in of topic. You can use "Against" instead the word "Upon" as a preposition or an adverb. popular alternative
Mutual synonyms
Both words in one sentence
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The birds deliberately use their droppings as weapons against prey they want to feed upon and against any creature attacking them.
Source: Poison Is Corrosive - Upon a kill it heals 50% of the player's base HP, and it's an instant One-Hit KO against another Half-Zatochi wielder.
Source: Draw Sword, Draw Blood - Humans Are Bastards: Many of the Freaks, good or bad, have been discriminated against or looked down upon them at one time or another.
Source: Literature / Decembersville
Cite this Source
Upon and Against. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/against/upon
Against & Upon. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/against/upon>.
Upon or Against. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/against/upon.
Google Ngram Viewer shows how "against" and "upon" have occurred on timeline