athletics vs upfield

athletics is a noun but upfield is not a noun.

Word	Noun	Adjective	Verb	Adverb
athletics	Yes	No	No	No
upfield	No	Yes	No	No

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

athletics (adjective)	upfield (adjective)
	away from the defending teams' end of the playing field