vane vs impeller

vane and impeller both are nouns.

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

As nouns, impeller is a hyponym of vane; that is, impeller is a word with a more specific, narrower meaning than vane:

Other hyponyms of vane include fan blade, paddle, rudder blade.

vane (noun)	impeller (noun)
the flattened weblike part of a feather consisting of a series of barbs on either side of the shaft	the blade of a rotor (as in the compressor of a jet engine)
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