/ Thesaurus / E Synonyms of extraterrestrial object Find synonyms for: Noun1. extraterrestrial object, estraterrestrial body, natural objectusage: a natural object existing outside the earth and outside the earth's atmosphereWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language