quicklime vs oxide

quicklime and oxide both are nouns.

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

As nouns, oxide is a hypernym of quicklime; that is, oxide is a word with a broader meaning than quicklime:

quicklime: a white crystalline oxide used in the production of calcium hydroxide
oxide: any compound of oxygen with another element or a radical

quicklime (noun)	oxide (noun)
a white crystalline oxide used in the production of calcium hydroxide	any compound of oxygen with another element or a radical