straight poker vs poker

straight poker and poker both are nouns.

Word	Noun	Adjective	Verb	Adverb
straight poker	Yes	No	No	No
poker	Yes	No	No	No

As nouns, poker is a hypernym of straight poker; that is, poker is a word with a broader meaning than straight poker:

straight poker: poker in which each player gets 5 cards face down and bets are made without drawing any further cards
poker: any of various card games in which players bet that they hold the highest-ranking hand

Other hypernyms of straight poker include poker game.

straight poker (noun)	poker (noun)
poker in which each player gets 5 cards face down and bets are made without drawing any further cards	any of various card games in which players bet that they hold the highest-ranking hand
	fire iron consisting of a metal rod with a handle; used to stir a fire