/ Thesaurus / J Synonyms of jovian planet Find synonyms for: Noun1. Jovian planet, gas giant, planet, major planetusage: any of the four outermost planets in the solar system; much larger than Earth and gaseous in nature (like Jupiter)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language