/ Thesaurus / J Synonyms of juan carlos Find synonyms for: Noun1. Juan Carlos, Juan Carlos Victor Maria de Borbon y Borbonusage: king of Spain since 1975 (born in 1938)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: beseech Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language