/ Thesaurus / A Synonyms of annexe Find synonyms for: Noun1. annex, annexe, extension, wing, addition, add-on, improverusage: an addition that extends a main buildingWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language