dartboard vs gameboard

dartboard and gameboard both are nouns.

Word	Noun	Adjective	Verb	Adverb
dartboard	Yes	No	No	No
gameboard	Yes	No	No	No

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

dartboard: 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 dartboard include board.

dartboard (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