pinball vs pachinko

pinball and pachinko both are nouns.

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

As nouns, pachinko is a hyponym of pinball; that is, pachinko is a word with a more specific, narrower meaning than pinball:

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

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