sulfide vs zinc sulfide

sulfide and zinc sulfide both are nouns.

Word	Noun	Adjective	Verb	Adverb
sulfide	Yes	No	No	No
zinc sulfide	Yes	No	No	No

As nouns, zinc sulfide is a hyponym of sulfide; that is, zinc sulfide is a word with a more specific, narrower meaning than sulfide:

sulfide: a compound of sulphur and some other element that is more electropositive
zinc sulfide: a yellow to white crystalline fluorescent compound that occurs naturally as sphalerite or wurtzite and is used as a luminous pigment

Other hyponyms of sulfide include pyrites, hydrogen sulfide, iron disulfide, cadmium sulfide, zinc sulphide.

sulfide (noun)	zinc sulfide (noun)
a compound of sulphur and some other element that is more electropositive	a yellow to white crystalline fluorescent compound that occurs naturally as sphalerite or wurtzite and is used as a luminous pigment