current of air vs air current

current of air and air current both are nouns.

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

As nouns, current of air and air current are synonyms defined as:

current of air and air current: air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure

Other synonyms of current of air include wind.

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