/ Thesaurus / O Synonyms of one thousand million Find synonyms for: Noun1. billion, one thousand million, 1000000000, large integerusage: the number that is represented as a one followed by 9 zerosWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language