north wind vs mistral

north wind and mistral both are nouns.

Word	Noun	Adjective	Verb	Adverb
north wind	Yes	No	No	No
mistral	Yes	No	No	No

As nouns, mistral is a hyponym of north wind; that is, mistral is a word with a more specific, narrower meaning than north wind:

Other hyponyms of north wind include bise, bize, tramontana, tramontane.

north wind (noun)	mistral (noun)
a wind that blows from the north	a strong north wind that blows in France during the winter