pachisi vs board game

pachisi and board game both are nouns.

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

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

pachisi: an ancient board game resembling backgammon; played on a cross-shaped board
board game: a game played on a specially designed board

pachisi (noun)	board game (noun)
an ancient board game resembling backgammon; played on a cross-shaped board	a game played on a specially designed board