cardsharper vs gouger

cardsharper and gouger both are nouns.

Word	Noun	Adjective	Verb	Adverb
cardsharper	Yes	No	No	No
gouger	Yes	No	No	No

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

cardsharper: 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 cardsharper include card player, chiseler, chiseller, defrauder, grifter, scammer, swindler.

cardsharper (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