easy mark vs victim

easy mark and victim both are nouns.

Word	Noun	Adjective	Verb	Adverb
easy mark	Yes	No	No	No
victim	Yes	No	No	No

As nouns, victim is a hypernym of easy mark; that is, victim is a word with a broader meaning than easy mark:

Other hypernyms of easy mark include dupe.

easy mark (noun)	victim (noun)
a defenseless victim	an unfortunate person who suffers from some adverse circumstance
	a person who is tricked or swindled