/ Thesaurus / O Synonyms of one million million million Find synonyms for: Noun1. trillion, one million million million, large integerusage: the number that is represented as a one followed by 18 zeros; "in England they call a quintillion a trillion"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language