blue stone vs cupric sulfate

blue stone and cupric sulfate both are nouns.

Word	Noun	Adjective	Verb	Adverb
blue stone	Yes	No	No	No
cupric sulfate	Yes	No	No	No

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

blue stone: hydrated blue crystalline form of copper sulfate
cupric sulfate: a copper salt made by the action of sulfuric acid on copper oxide

Other hypernyms of blue stone include copper sulfate, copper sulphate, cupric sulphate.

blue stone (noun)	cupric sulfate (noun)
hydrated blue crystalline form of copper sulfate	a copper salt made by the action of sulfuric acid on copper oxide