betrayer vs slicker

betrayer and slicker both are nouns.

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

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

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

betrayer (noun)	slicker (noun)
a person who says one thing and does another	a macintosh made from cotton fabric treated with oil and pigment to make it waterproof
one who reveals confidential information to the police or other authority	someone who leads you to believe something that is not true
	a person with good manners and stylish clothing