/ Thesaurus / B Synonyms of book of isaiah Find synonyms for: Noun1. Isaiah, Book of Isaiahusage: an Old Testament book consisting of Isaiah's propheciesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language