athletics vs most-valuable

athletics is a noun but most-valuable is not a noun.

Word	Noun	Adjective	Verb	Adverb
athletics	Yes	No	No	No
most-valuable	No	Yes	No	No

athletics (noun)	most-valuable (noun)
an active diversion requiring physical exertion and competition
participation in sports events as an extracurricular activity
a contest between athletes

athletics (adjective)	most-valuable (adjective)
	designating the player judged to be the most important to the sport