five hundred vs cards

five hundred and cards both are nouns.

Word	Noun	Adjective	Verb	Adverb
five hundred	Yes	Yes	No	No
cards	Yes	No	No	No

As nouns, cards is a hypernym of five hundred; that is, cards is a word with a broader meaning than five hundred:

five hundred: a card game similar to ecarte; each player is dealt 5 cards and the player making trump must take 3 tricks to win a hand
cards: a game played with playing cards

Other hypernyms of five hundred include card game.

five hundred (noun)	cards (noun)
a card game similar to ecarte; each player is dealt 5 cards and the player making trump must take 3 tricks to win a hand	a game played with playing cards
the cardinal number that is the product of one hundred and five

five hundred (adjective)	cards (adjective)
denoting a quantity consisting of 500 items or units