gale vs air current

gale and air current both are nouns.

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

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

gale: a strong wind moving 45-90 knots; force 7 to 10 on Beaufort scale
air current: air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure

Other hypernyms of gale include current of air, wind.

gale (noun)	air current (noun)
a strong wind moving 45-90 knots; force 7 to 10 on Beaufort scale	air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure