calcium oxide vs calcined lime

calcium oxide and calcined lime both are nouns.

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

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

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

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

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