netball vs court game

netball and court game both are nouns.

Word	Noun	Adjective	Verb	Adverb
netball	Yes	No	No	No
court game	Yes	No	No	No

As nouns, court game is a hypernym of netball; that is, court game is a word with a broader meaning than netball:

netball: a team game that resembles basketball; a soccer ball is to be thrown so that it passes through a ring on the top of a post
court game: an athletic game played on a court

netball (noun)	court game (noun)
a team game that resembles basketball; a soccer ball is to be thrown so that it passes through a ring on the top of a post	an athletic game played on a court