tenpins vs tenpin bowling

tenpins and tenpin bowling both are nouns.

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

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

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

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