blue vitriol vs blue copperas

blue vitriol and blue copperas both are nouns.

Word	Noun	Adjective	Verb	Adverb
blue vitriol	Yes	No	No	No
blue copperas	Yes	No	No	No

As nouns, blue vitriol and blue copperas are synonyms defined as:

blue vitriol and blue copperas: hydrated blue crystalline form of copper sulfate

Other synonyms of blue vitriol include blue stone, chalcanthite.

blue vitriol (noun)	blue copperas (noun)
hydrated blue crystalline form of copper sulfate	hydrated blue crystalline form of copper sulfate