foehn vs air current

foehn and air current both are nouns.

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

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

foehn: a warm dry wind that blows down the northern slopes of the Alps
air current: air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure

Other hypernyms of foehn include current of air, wind.

foehn (noun)	air current (noun)
a warm dry wind that blows down the northern slopes of the Alps	air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure