crosswind vs air current

crosswind and air current both are nouns.

Word	Noun	Adjective	Verb	Adverb
crosswind	Yes	No	No	No
air current	Yes	No	No	No

As nouns, air current is a hypernym of crosswind; that is, air current is a word with a broader meaning than crosswind:

crosswind: wind blowing across the path of a ship or aircraft
air current: air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure

Other hypernyms of crosswind include current of air, wind.

crosswind (noun)	air current (noun)
wind blowing across the path of a ship or aircraft	air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure