football team vs fullback

football team and fullback both are nouns.

Word	Noun	Adjective	Verb	Adverb
football team	Yes	No	No	No
fullback	Yes	No	Yes	No

football team (noun)	fullback (noun)
a team that plays football	(American football) the position of a back on a football team, generally larger in size than halfbacks
	(football) the running back who plays the fullback position on the offensive team

football team (verb)	fullback (verb)
	play the fullback