variorum vs variorum edition

variorum and variorum edition both are nouns.

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

As nouns, variorum and variorum edition are synonyms defined as:

variorum and variorum edition: an edition containing various versions of a text or notes by various scholars or editors

variorum (noun)	variorum edition (noun)
an edition containing various versions of a text or notes by various scholars or editors	an edition containing various versions of a text or notes by various scholars or editors