/ Thesaurus / B Synonyms of be on cloud nine Find synonyms for: Verb1. exult, walk on air, be on cloud nine, jump for joy, rejoice, joyusage: feel extreme happiness or elationWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language