northwester vs air current

northwester and air current both are nouns.

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

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

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

Other hypernyms of northwester include current of air, wind.

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