poker game vs poker

poker game and poker both are nouns.

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

As nouns, poker game and poker are synonyms defined as:

poker game and poker: any of various card games in which players bet that they hold the highest-ranking hand

poker game (noun)	poker (noun)
any of various card games in which players bet that they hold the highest-ranking hand	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