north wind vs air current

north wind and air current both are nouns.

Word	Noun	Adjective	Verb	Adverb
north wind	Yes	No	No	No
air current	Yes	No	No	No

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

north wind: a wind that blows from the north
air current: air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure

Other hypernyms of north wind include current of air, wind.

north wind (noun)	air current (noun)
a wind that blows from the north	air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure