valvular vs valve

valvular is not a noun while valve is a noun.

Word	Noun	Adjective	Verb	Adverb
valvular	No	Yes	No	No
valve	Yes	No	No	No

valvular (noun)	valve (noun)
	one of the paired hinged shells of certain molluscs and of brachiopods
	the entire one-piece shell of a snail and certain other molluscs
	control consisting of a mechanical device for controlling the flow of a fluid
	device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
	a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it

valvular (adjective)	valve (adjective)
relating to or operating by means of valves