quicklime vs calcium oxide

quicklime and calcium oxide both are nouns.

Word	Noun	Adjective	Verb	Adverb
quicklime	Yes	No	No	No
calcium oxide	Yes	No	No	No

As nouns, quicklime and calcium oxide are synonyms defined as:

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

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

quicklime (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