foul play vs evil

foul play and evil both are nouns.

Word	Noun	Adjective	Verb	Adverb
foul play	Yes	No	No	No
evil	Yes	Yes	No	No

As nouns, evil is a hypernym of foul play; that is, evil is a word with a broader meaning than foul play:

Other hypernyms of foul play include immorality, iniquity, wickedness.

foul play (noun)	evil (noun)
unfair or dishonest behavior (especially involving violence)	morally objectionable behavior
	the quality of being morally wrong in principle or practice

foul play (adjective)	evil (adjective)
	morally bad or wrong
	having or exerting a malignant influence
	having the nature of vice