cardsharp vs cardsharper

cardsharp and cardsharper both are nouns.

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

As nouns, cardsharp and cardsharper are synonyms defined as:

cardsharp and cardsharper: a professional card player who makes a living by cheating at card games

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

cardsharp (noun)	cardsharper (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