bearing metal vs white metal

bearing metal and white metal both are nouns.

Word	Noun	Adjective	Verb	Adverb
bearing metal	Yes	No	No	No
white metal	Yes	No	No	No

As nouns, bearing metal and white metal are synonyms defined as:

bearing metal and white metal: an alloy (often of lead or tin base) used for bearings

bearing metal (noun)	white metal (noun)
an alloy (often of lead or tin base) used for bearings	an alloy (often of lead or tin base) used for bearings