burnt lime vs fluxing lime

burnt lime and fluxing lime both are nouns.

Word	Noun	Adjective	Verb	Adverb
burnt lime	Yes	No	No	No
fluxing lime	Yes	No	No	No

As nouns, burnt lime and fluxing lime are synonyms defined as:

burnt lime and fluxing lime: a white crystalline oxide used in the production of calcium hydroxide

Other synonyms of burnt lime include calcined lime, calcium oxide, calx, lime, quicklime, unslaked lime.

burnt lime (noun)	fluxing lime (noun)
a white crystalline oxide used in the production of calcium hydroxide	a white crystalline oxide used in the production of calcium hydroxide