/ Thesaurus / B Synonyms of billions Find synonyms for: Noun1. billion, one million million, 1000000000000, large integerusage: the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen2. million, billion, trillion, zillion, jillion, gazillion, large indefinite quantity, large indefinite amountusage: a very large indefinite number (usually hyperbole); "there were millions of flies"3. 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: leonine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language