cupric sulfate vs sulphate

cupric sulfate and sulphate both are nouns.

Word	Noun	Adjective	Verb	Adverb
cupric sulfate	Yes	No	No	No
sulphate	Yes	No	No	No

As nouns, sulphate is a hypernym of cupric sulfate; that is, sulphate is a word with a broader meaning than cupric sulfate:

cupric sulfate: a copper salt made by the action of sulfuric acid on copper oxide
sulphate: a salt or ester of sulphuric acid

Other hypernyms of cupric sulfate include sulfate.

cupric sulfate (noun)	sulphate (noun)
a copper salt made by the action of sulfuric acid on copper oxide	a salt or ester of sulphuric acid