sulfide vs sulphide

sulfide and sulphide both are nouns.

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

As nouns, sulfide and sulphide are synonyms defined as:

sulfide and sulphide: a compound of sulphur and some other element that is more electropositive

sulfide (noun)	sulphide (noun)
a compound of sulphur and some other element that is more electropositive	a compound of sulphur and some other element that is more electropositive