tailwind vs current of air

tailwind and current of air both are nouns.

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

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

tailwind: wind blowing in the same direction as the path of a ship or aircraft
current of air: air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure

Other hypernyms of tailwind include air current, wind.

tailwind (noun)	current of air (noun)
wind blowing in the same direction as the path of a ship or aircraft	air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure