Breadcrumb Home > Thesaurus > O Synonyms of octillion Find synonyms for: Noun 1. octillion, large integer usage: the number that is represented as a one followed by 27 zeros WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of octillion (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: tintinnabulation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language