vane vs rotating mechanism

vane and rotating mechanism both are nouns.

Word	Noun	Adjective	Verb	Adverb
vane	Yes	No	No	No
rotating mechanism	Yes	No	No	No

As nouns, rotating mechanism is a hypernym of vane; that is, rotating mechanism is a word with a broader meaning than vane:

vane (noun)	rotating mechanism (noun)
the flattened weblike part of a feather consisting of a series of barbs on either side of the shaft	a mechanism that rotates
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