fullback vs football team

fullback and football team both are nouns.

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

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

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