octavo vs 8vo

octavo and 8vo both are nouns.

Word	Noun	Adjective	Verb	Adverb
octavo	Yes	No	No	No
8vo	Yes	No	No	No

As nouns, octavo and 8vo are synonyms defined as:

octavo and 8vo: the size of a book whose pages are made by folding a sheet of paper three times to form eight leaves

Other synonyms of octavo include eightvo.

octavo (noun)	8vo (noun)
the size of a book whose pages are made by folding a sheet of paper three times to form eight leaves	the size of a book whose pages are made by folding a sheet of paper three times to form eight leaves