keno vs board game

keno and board game both are nouns.

Word	Noun	Adjective	Verb	Adverb
keno	Yes	No	No	No
board game	Yes	No	No	No

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

keno: a game in which numbered balls are drawn at random and players cover the corresponding numbers on their cards
board game: a game played on a specially designed board

keno (noun)	board game (noun)
a game in which numbered balls are drawn at random and players cover the corresponding numbers on their cards	a game played on a specially designed board