baseball vs baseball player

baseball and baseball player both are nouns.

Word	Noun	Adjective	Verb	Adverb
baseball	Yes	No	No	No
baseball player	Yes	No	No	No

baseball (noun)	baseball player (noun)
a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs	an athlete who plays baseball
a ball used in playing baseball