baseball team vs left field

baseball team and left field both are nouns.

Word	Noun	Adjective	Verb	Adverb
baseball team	Yes	No	No	No
left field	Yes	No	No	No

baseball team (noun)	left field (noun)
a team that plays baseball	the fielding position of the player on a baseball team who is expected to field balls in the left third of the outfield (looking from home plate)
	the piece of ground in the outfield on the catcher's left