pachinko vs pinball game

pachinko and pinball game both are nouns.

Word	Noun	Adjective	Verb	Adverb
pachinko	Yes	No	No	No
pinball game	Yes	No	No	No

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

pachinko: a Japanese pinball game played on a vertical board
pinball game: a game played on a sloping board; the object is to propel marbles against pins or into pockets

Other hypernyms of pachinko include pinball.

pachinko (noun)	pinball game (noun)
a Japanese pinball game played on a vertical board	a game played on a sloping board; the object is to propel marbles against pins or into pockets