vane vs whirlybird

vane and whirlybird both are nouns.

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

vane (noun)	whirlybird (noun)
the flattened weblike part of a feather consisting of a series of barbs on either side of the shaft	an aircraft without wings that obtains its lift from the rotation of overhead blades
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