souther vs air current

souther and air current both are nouns.

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

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

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

Other hypernyms of souther include current of air, wind.

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