burnt lime vs oxide

burnt lime and oxide both are nouns.

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

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

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

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