sham vs slicker

sham and slicker both are nouns.

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

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

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

sham (noun)	slicker (noun)
something that is a counterfeit; not what it seems to be	a macintosh made from cotton fabric treated with oil and pigment to make it waterproof
a person who makes deceitful pretenses	someone who leads you to believe something that is not true
	a person with good manners and stylish clothing

sham (adjective)	slicker (adjective)
adopted in order to deceive

sham (verb)	slicker (verb)
make believe with the intent to deceive
make a pretence of