/ Thesaurus / O Synonyms of oblateness Find synonyms for: Noun1. oblateness, ellipticity, roundedness, bulginessusage: the property possessed by a round shape that is flattened at the poles; "the oblateness of the planet"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language