fortune hunter vs cheater

fortune hunter and cheater both are nouns.

Word	Noun	Adjective	Verb	Adverb
fortune hunter	Yes	No	No	No
cheater	Yes	No	No	No

As nouns, cheater is a hypernym of fortune hunter; that is, cheater is a word with a broader meaning than fortune hunter:

Other hypernyms of fortune hunter include beguiler, cheat, deceiver, slicker, trickster.

fortune hunter (noun)	cheater (noun)
a person who seeks wealth through marriage	someone who leads you to believe something that is not true