flowers of zinc vs oxide

flowers of zinc and oxide both are nouns.

Word	Noun	Adjective	Verb	Adverb
flowers of zinc	Yes	No	No	No
oxide	Yes	No	No	No

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

flowers of zinc: oxide of zinc; a white powder used as a pigment or in cosmetics or glass or inks and in zinc ointment
oxide: any compound of oxygen with another element or a radical

flowers of zinc (noun)	oxide (noun)
oxide of zinc; a white powder used as a pigment or in cosmetics or glass or inks and in zinc ointment	any compound of oxygen with another element or a radical