sharper vs grifter

sharper and grifter both are nouns.

Word	Noun	Adjective	Verb	Adverb
sharper	Yes	No	No	No
grifter	Yes	No	No	No

As nouns, grifter is a hypernym of sharper; that is, grifter is a word with a broader meaning than sharper:

sharper: a professional card player who makes a living by cheating at card games
grifter: a person who swindles you by means of deception or fraud

Other hypernyms of sharper include card player, chiseler, chiseller, defrauder, gouger, scammer, swindler.

sharper (noun)	grifter (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