southeaster vs air current

southeaster and air current both are nouns.

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

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

southeaster: a strong wind from the southeast
air current: air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure

Other hypernyms of southeaster include current of air, wind.

southeaster (noun)	air current (noun)
a strong wind from the southeast	air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure