calx vs fluxing lime

calx and fluxing lime both are nouns.

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

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

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

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

calx (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