card sharper vs gouger

card sharper and gouger both are nouns.

Word	Noun	Adjective	Verb	Adverb
card sharper	Yes	No	No	No
gouger	Yes	No	No	No

As nouns, gouger is a hypernym of card sharper; that is, gouger is a word with a broader meaning than card sharper:

card sharper: a professional card player who makes a living by cheating at card games
gouger: a person who swindles you by means of deception or fraud

Other hypernyms of card sharper include card player, chiseler, chiseller, defrauder, grifter, scammer, swindler.

card sharper (noun)	gouger (noun)
a professional card player who makes a living by cheating at card games	a person who swindles you by means of deception or fraud
	an attacker who gouges out the antagonist's eye