ludo vs board game

ludo and board game both are nouns.

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

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

ludo: a simple board game in which players move counters according to the throw of dice
board game: a game played on a specially designed board

ludo (noun)	board game (noun)
a simple board game in which players move counters according to the throw of dice	a game played on a specially designed board