/ Thesaurus / 8 Synonyms of 8vo Find synonyms for: Noun1. octavo, eightvo, 8vo, sizeusage: the size of a book whose pages are made by folding a sheet of paper three times to form eight leavesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language