pinochle vs card game

pinochle and card game both are nouns.

Word	Noun	Adjective	Verb	Adverb
pinochle	Yes	No	No	No
card game	Yes	No	No	No

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

pinochle: a card game played with a pack of forty-eight cards (two of each suit for high cards); play resembles whist
card game: a game played with playing cards

Other hypernyms of pinochle include cards.

pinochle (noun)	card game (noun)
a card game played with a pack of forty-eight cards (two of each suit for high cards); play resembles whist	a game played with playing cards