imitator vs slicker

imitator and slicker both are nouns.

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

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

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

imitator (noun)	slicker (noun)
someone who copies the words or behavior of another	a macintosh made from cotton fabric treated with oil and pigment to make it waterproof
someone who (fraudulently) assumes the appearance of another	someone who leads you to believe something that is not true
	a person with good manners and stylish clothing