card shark vs sharper

card shark and sharper both are nouns.

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

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

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

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

card shark (noun)	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