Breadcrumb Home > Thesaurus > P Synonyms of planetoid Find synonyms for: Noun1. minor planet, planetoid, celestial body, heavenly bodyusage: any of numerous small celestial bodies that move around the sunWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of planetoid (Dictionary) ✖ Related Content Daily Word Quiz: rocrustean Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language