dependant on vs dependant upon

dependant on and dependant upon both are adjectives.

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

As adjectives, dependant on and dependant upon are synonyms defined as:

dependant on and dependant upon: being determined by conditions or circumstances that follow

Other synonyms of dependant on include contingent, contingent on, contingent upon, dependent on, dependent upon, depending on.

dependant on (adjective)	dependant upon (adjective)
being determined by conditions or circumstances that follow	being determined by conditions or circumstances that follow