football vs quarterback

football and quarterback both are nouns.

Word	Noun	Adjective	Verb	Adverb
football	Yes	No	No	No
quarterback	Yes	No	Yes	No

football (noun)	quarterback (noun)
any of various games played with a ball (round or oval) in which two teams try to kick or carry or propel the ball into each other's goal	(American football) the position of the football player in the backfield who directs the offensive play of his team
the inflated oblong ball used in playing American football	(football) the person who plays quarterback

football (verb)	quarterback (verb)
	play the quarterback