stagnate vs stagnancy

stagnate is not a noun while stagnancy is a noun.

Word	Noun	Adjective	Verb	Adverb
stagnate	No	No	Yes	No
stagnancy	Yes	No	No	No

stagnate (noun)	stagnancy (noun)
	a state of inactivity (in business or art etc)
	inactivity of liquids; being stagnant; standing still; without current or circulation

stagnate (verb)	stagnancy (verb)
be idle; exist in a changeless situation
cease to flow; stand without moving
stand still
cause to stagnate