con artist vs grifter

con artist and grifter both are nouns.

Word	Noun	Adjective	Verb	Adverb
con artist	Yes	No	No	No
grifter	Yes	No	No	No

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

Other hypernyms of con artist include chiseler, chiseller, defrauder, gouger, scammer, swindler.

con artist (noun)	grifter (noun)
a swindler who exploits the confidence of his victim	a person who swindles you by means of deception or fraud