air sock vs sock

air sock and sock both are nouns.

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

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

air sock and 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, wind cone, wind sleeve, wind sock, windsock.

air sock (noun)	sock (noun)
a truncated cloth cone mounted on a mast; used (e.g., at airports) to show the direction of the wind	hosiery consisting of a cloth covering for the foot; worn inside the shoe; reaches to between the ankle and the knee
	a truncated cloth cone mounted on a mast; used (e.g., at airports) to show the direction of the wind

air sock (verb)	sock (verb)
	hit hard