foul play vs wickedness

foul play and wickedness both are nouns.

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

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

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

foul play (noun)	wickedness (noun)
unfair or dishonest behavior (especially involving violence)	morally objectionable behavior
	the quality of being wicked
	estrangement from god
	the quality of being disgusting to the senses or emotions
	absence of moral or spiritual values