variorum vs edition

variorum and edition both are nouns.

Word	Noun	Adjective	Verb	Adverb
variorum	Yes	No	No	No
edition	Yes	No	No	No

As nouns, edition is a hypernym of variorum; that is, edition is a word with a broader meaning than variorum:

variorum: an edition containing various versions of a text or notes by various scholars or editors
edition: the form in which a text (especially a printed book) is published

variorum (noun)	edition (noun)
an edition containing various versions of a text or notes by various scholars or editors	something a little different from others of the same type
	an issue of a newspaper
	the form in which a text (especially a printed book) is published
	all of the identical copies of something offered to the public at the same time