card sharp vs card sharper

card sharp and card sharper both are nouns.

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

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

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

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

card sharp (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