slicker vs mackintosh

slicker and mackintosh both are nouns.

Word	Noun	Adjective	Verb	Adverb
slicker	Yes	No	No	No
mackintosh	Yes	No	No	No

As nouns, mackintosh is a hypernym of slicker; that is, mackintosh is a word with a broader meaning than slicker:

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

Other hypernyms of slicker include mac, macintosh, mack.

slicker (noun)	mackintosh (noun)
a macintosh made from cotton fabric treated with oil and pigment to make it waterproof	a lightweight waterproof (usually rubberized) fabric
someone who leads you to believe something that is not true	a waterproof raincoat made of rubberized fabric
a person with good manners and stylish clothing