air current vs current of air

air current and current of air both are nouns.

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

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

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

Other synonyms of air current include wind.

air current (noun)	current of air (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