prey vs fair game

prey and fair game both are nouns.

Word	Noun	Adjective	Verb	Adverb
prey	Yes	No	Yes	No
fair game	Yes	No	No	No

As nouns, prey and fair game are synonyms defined as:

prey and fair game: a person who is the aim of an attack (especially a victim of ridicule or exploitation) by some hostile person or influence

Other synonyms of prey include quarry, target.

prey (noun)	fair game (noun)
animal hunted or caught for food	a person who is the aim of an attack (especially a victim of ridicule or exploitation) by some hostile person or influence
a person who is the aim of an attack (especially a victim of ridicule or exploitation) by some hostile person or influence

prey (verb)	fair game (verb)
profit from in an exploitatory manner
prey on or hunt for