needle bearing vs roller bearing

needle bearing and roller bearing both are nouns.

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

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

needle bearing and roller bearing: bearings containing small metal balls

Other synonyms of needle bearing include ball bearing.

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