baseball team vs second base

baseball team and second base both are nouns.

Word	Noun	Adjective	Verb	Adverb
baseball team	Yes	No	No	No
second base	Yes	No	No	No

baseball team (noun)	second base (noun)
a team that plays baseball	the fielding position of the player on a baseball team who is stationed near the second of the bases in the infield
	the base that must be touched second by a base runner in baseball