burnt lime vs calcium oxide

burnt lime and calcium oxide both are nouns.

Word	Noun	Adjective	Verb	Adverb
burnt lime	Yes	No	No	No
calcium oxide	Yes	No	No	No

As nouns, burnt lime and calcium oxide are synonyms defined as:

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

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

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