oilskin vs macintosh

oilskin and macintosh both are nouns.

Word	Noun	Adjective	Verb	Adverb
oilskin	Yes	No	No	No
macintosh	Yes	No	No	No

As nouns, macintosh is a hypernym of oilskin; that is, macintosh is a word with a broader meaning than oilskin:

oilskin: a macintosh made from cotton fabric treated with oil and pigment to make it waterproof
macintosh: a waterproof raincoat made of rubberized fabric

Other hypernyms of oilskin include mac, mack, mackintosh.

oilskin (noun)	macintosh (noun)
a macintosh made from cotton fabric treated with oil and pigment to make it waterproof	a waterproof raincoat made of rubberized fabric
	a lightweight waterproof (usually rubberized) fabric