On and Upon

On preposition - In or into contact with.

Upon is a synonym for on in part of speech topic. In some cases you can use "Upon" instead the word "On" as a preposition or an adverb or an adjective, when it comes to topics like position, over, ahead of, of. popular alternative

Upon preposition - In or into contact with.

On is a synonym for upon in part of speech topic. You can use "On" instead the word "Upon" as a preposition or an adverb or an adjective, if it concerns topics such as position, over, of, to. popular alternative