cosponsor vs patronise

cosponsor and patronise both are verbs.

Word	Noun	Adjective	Verb	Adverb
cosponsor	No	No	Yes	No
patronise	No	No	Yes	No

As verbs, patronise is a hypernym of cosponsor; that is, patronise is a word with a broader meaning than cosponsor:

Other hypernyms of cosponsor include patronize, sponsor.

cosponsor (verb)	patronise (verb)
sponsor together with another sponsor	be a regular customer or client of
	treat condescendingly
	assume sponsorship of
	do one's shopping at; do business with; be a customer or client of