utterer vs slicker

utterer and slicker both are nouns.

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

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

Other hypernyms of utterer include beguiler, cheat, cheater, deceiver, trickster.

utterer (noun)	slicker (noun)
someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)	a macintosh made from cotton fabric treated with oil and pigment to make it waterproof
someone who circulates forged banknotes or counterfeit coins	someone who leads you to believe something that is not true
an organism that can utter vocal sounds	a person with good manners and stylish clothing