dart board vs gameboard

dart board and gameboard both are nouns.

Word	Noun	Adjective	Verb	Adverb
dart board	Yes	No	No	No
gameboard	Yes	No	No	No

As nouns, gameboard is a hypernym of dart board; that is, gameboard is a word with a broader meaning than dart board:

dart board: a circular board of wood or cork used as the target in the game of darts
gameboard: a flat portable surface (usually rectangular) designed for board games

Other hypernyms of dart board include board.

dart board (noun)	gameboard (noun)
a circular board of wood or cork used as the target in the game of darts	a flat portable surface (usually rectangular) designed for board games