handwheel vs valve

handwheel and valve both are nouns.

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

handwheel (noun)	valve (noun)
control consisting of a wheel whose rim serves as the handle by which a part is operated	one of the paired hinged shells of certain molluscs and of brachiopods
a wheel worked by hand	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