depend on vs depend upon

depend on and depend upon both are verbs.

Word	Noun	Adjective	Verb	Adverb
depend on	No	No	Yes	No
depend upon	No	No	Yes	No

As verbs, depend on and depend upon are synonyms defined as:

Other synonyms of depend on include devolve on, hinge on, hinge upon, ride, turn on.

As verbs, depend on and depend upon are synonyms defined as:

Other synonyms of depend on include rely on, rely upon.

depend on (verb)	depend upon (verb)
be contingent on	be contingent on
be dependent on, as for support or maintenance	put trust in with confidence
put trust in with confidence