clientele vs patronage

clientele and patronage both are nouns.

Word	Noun	Adjective	Verb	Adverb
clientele	Yes	No	No	No
patronage	Yes	No	Yes	No

As nouns, clientele and patronage are synonyms defined as:

Other synonyms of clientele include business.

clientele (noun)	patronage (noun)
customers collectively	the act of providing approval and support
	(politics) granting favors or giving contracts or making appointments to office in return for political support
	the business given to a commercial establishment by its customers
	a communication that indicates lack of respect by patronizing the recipient
	customers collectively

clientele (verb)	patronage (verb)
	be a regular customer or client of
	support by being a patron of