ninepins vs skittles

ninepins and skittles both are nouns.

Word	Noun	Adjective	Verb	Adverb
ninepins	Yes	No	No	No
skittles	Yes	No	No	No

As nouns, ninepins and skittles are synonyms defined as:

ninepins and skittles: a bowling game that is played by rolling a bowling ball down a bowling alley at a target of nine wooden pins

ninepins (noun)	skittles (noun)
a bowling game that is played by rolling a bowling ball down a bowling alley at a target of nine wooden pins	a bowling game that is played by rolling a bowling ball down a bowling alley at a target of nine wooden pins