white lead vs lead carbonate

white lead and lead carbonate both are nouns.

Word	Noun	Adjective	Verb	Adverb
white lead	Yes	No	No	No
lead carbonate	Yes	No	No	No

As nouns, white lead and lead carbonate are synonyms defined as:

white lead and lead carbonate: a poisonous white pigment that contains lead

Other synonyms of white lead include ceruse.

white lead (noun)	lead carbonate (noun)
a poisonous white pigment that contains lead	a poisonous white pigment that contains lead