Breadcrumb Home > Thesaurus > C Synonyms of comet Find synonyms for: Noun 1. comet, extraterrestrial object, estraterrestrial body usage: (astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of comet (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: terraincognita Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language