card shark vs card sharper

card shark and card sharper both are nouns.

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

As nouns, card shark and card sharper are synonyms defined as:

card shark and card sharper: a professional card player who makes a living by cheating at card games

Other synonyms of card shark include card sharp, cardsharp, cardsharper, sharper, sharpie, sharpy.

card shark (noun)	card sharper (noun)
a professional card player who makes a living by cheating at card games	a professional card player who makes a living by cheating at card games