roller bearing vs needle bearing

roller bearing and needle bearing both are nouns.

Word	Noun	Adjective	Verb	Adverb
roller bearing	Yes	No	No	No
needle bearing	Yes	No	No	No

As nouns, roller bearing and needle bearing are synonyms defined as:

roller bearing and needle bearing: bearings containing small metal balls

Other synonyms of roller bearing include ball bearing.

roller bearing (noun)	needle bearing (noun)
bearings containing small metal balls	bearings containing small metal balls