tenpin bowling vs tenpins

tenpin bowling and tenpins both are nouns.

Word	Noun	Adjective	Verb	Adverb
tenpin bowling	Yes	No	No	No
tenpins	Yes	No	No	No

As nouns, tenpin bowling and tenpins are synonyms defined as:

tenpin bowling and tenpins: bowling down an alley at a target of ten wooden pins

tenpin bowling (noun)	tenpins (noun)
bowling down an alley at a target of ten wooden pins	bowling down an alley at a target of ten wooden pins