high-low-jack vs cards

high-low-jack and cards both are nouns.

Word	Noun	Adjective	Verb	Adverb
high-low-jack	Yes	No	No	No
cards	Yes	No	No	No

As nouns, cards is a hypernym of high-low-jack; that is, cards is a word with a broader meaning than high-low-jack:

high-low-jack: card games in which points are won for taking the high or low or jack or game
cards: a game played with playing cards

Other hypernyms of high-low-jack include card game.

high-low-jack (noun)	cards (noun)
card games in which points are won for taking the high or low or jack or game	a game played with playing cards