sou'easter vs current of air

sou'easter and current of air both are nouns.

Word	Noun	Adjective	Verb	Adverb
sou'easter	Yes	No	No	No
current of air	Yes	No	No	No

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

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

Other hypernyms of sou'easter include air current, wind.

sou'easter (noun)	current of air (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