air sock vs wind sock

air sock and wind sock both are nouns.

Word	Noun	Adjective	Verb	Adverb
air sock	Yes	No	No	No
wind sock	Yes	No	No	No

As nouns, air sock and wind sock are synonyms defined as:

air sock and wind sock: a truncated cloth cone mounted on a mast; used (e.g., at airports) to show the direction of the wind

Other synonyms of air sock include air-sleeve, drogue, sock, wind cone, wind sleeve, windsock.

air sock (noun)	wind sock (noun)
a truncated cloth cone mounted on a mast; used (e.g., at airports) to show the direction of the wind	a truncated cloth cone mounted on a mast; used (e.g., at airports) to show the direction of the wind