slicker vs mack

slicker and mack both are nouns.

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

As nouns, mack is a hypernym of slicker; that is, mack 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
mack: a waterproof raincoat made of rubberized fabric

Other hypernyms of slicker include mac, macintosh, mackintosh.

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