persistence vs persistent

persistence is a noun but persistent is not a noun.

Word	Noun	Adjective	Verb	Adverb
persistence	Yes	No	No	No
persistent	No	Yes	No	No

persistence (noun)	persistent (noun)
the act of persisting or persevering; continuing or repeating behavior
persistent determination
the property of a continuous and connected period of time

persistence (adjective)	persistent (adjective)
	retained; not shed
	never-ceasing
	stubbornly unyielding
	continually recurring to the mind