/ Thesaurus / C Synonyms of cardcastle Find synonyms for: Noun1. house of cards, cardhouse, card-house, cardcastle, structure, constructionusage: an unstable construction with playing cards; "he built three levels of his cardcastle before it collapsed"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language