dependant on vs dependent upon

dependant on and dependent upon both are adjectives.

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

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

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

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

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