/ Thesaurus / B Synonyms of building complex Find synonyms for: Noun1. building complex, complex, structure, constructionusage: a whole structure (as a building) made up of interconnected or related structuresWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language