fluxing lime vs oxide

fluxing lime and oxide both are nouns.

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

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

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

fluxing 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