windmill vs vane

windmill and vane both are nouns.

Word	Noun	Adjective	Verb	Adverb
windmill	Yes	No	No	No
vane	Yes	No	No	No

windmill (noun)	vane (noun)
generator that extracts usable energy from winds	the flattened weblike part of a feather consisting of a series of barbs on either side of the shaft
a mill that is powered by the wind	mechanical device attached to an elevated structure; rotates freely to show the direction of the wind
	flat surface that rotates and pushes against air or water
	a fin attached to the tail of an arrow, bomb or missile in order to stabilize or guide it