oversupply vs surfeit

oversupply and surfeit both are nouns.

Word	Noun	Adjective	Verb	Adverb
oversupply	Yes	No	Yes	No
surfeit	Yes	No	Yes	No

As nouns, oversupply and surfeit are synonyms defined as:

oversupply and surfeit: the quality of being so overabundant that prices fall

Other synonyms of oversupply include glut.

oversupply (noun)	surfeit (noun)
the quality of being so overabundant that prices fall	eating until excessively full
	the quality of being so overabundant that prices fall
	the state of being more than full

oversupply (verb)	surfeit (verb)
supply with an excess of	indulge (one's appetite) to satiety
	supply or feed to surfeit