running vs American football

running and American football both are nouns.

Word	Noun	Adjective	Verb	Adverb
running	Yes	Yes	No	No
American football	Yes	No	No	No

running (noun)	American football (noun)
the act of participating in an athletic competition involving running on a track	a game played by two teams of 11 players on a rectangular field 100 yards long; teams try to get possession of the ball and advance it across the opponents goal line in a series of (running or passing) plays
the act of running; traveling on foot at a fast pace
the act of administering or being in charge of something
(American football) a play in which a player attempts to carry the ball through or past the opposing team
the state of being in operation

running (adjective)	American football (adjective)
of advancing the ball by running
executed or initiated by running
(of fluids) moving or issuing in a stream
continually repeated over a period of time
(of e.g. a machine) performing or capable of performing
measured lengthwise