front man vs slicker

front man and slicker both are nouns.

Word	Noun	Adjective	Verb	Adverb
front man	Yes	No	No	No
slicker	Yes	No	No	No

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

Other hypernyms of front man include beguiler, cheat, cheater, deceiver, trickster.

front man (noun)	slicker (noun)
a person used as a cover for some questionable activity	a macintosh made from cotton fabric treated with oil and pigment to make it waterproof
	someone who leads you to believe something that is not true
	a person with good manners and stylish clothing