prevailing wind vs air current

prevailing wind and air current both are nouns.

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

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

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

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

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