raincoat vs mack

raincoat and mack both are nouns.

Word	Noun	Adjective	Verb	Adverb
raincoat	Yes	No	No	No
mack	Yes	No	No	No

As nouns, mack is a hyponym of raincoat; that is, mack is a word with a more specific, narrower meaning than raincoat:

Other hyponyms of raincoat include Burberry, mac, macintosh, mackintosh, trench coat.

raincoat (noun)	mack (noun)
a water-resistant coat	a waterproof raincoat made of rubberized fabric