persevering vs patient

persevering is not a noun while patient is a noun.

Word	Noun	Adjective	Verb	Adverb
persevering	No	Yes	No	No
patient	Yes	Yes	No	No

persevering (noun)	patient (noun)
	the semantic role of an entity that is not the agent but is directly involved in or affected by the happening denoted by the verb in the clause
	a person who requires medical care

persevering (adjective)	patient (adjective)
quietly and steadily persevering especially in detail or exactness	enduring trying circumstances with even temper or characterized by such endurance