east wind vs air current

east wind and air current both are nouns.

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

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

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

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

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