Breadcrumb Home > Thesaurus > I Cite Synonyms of imperturbability Find synonyms for: Noun1. coolness, imperturbability, imperturbableness, calmnessusage: calm and unruffled self-assurance; "he performed with all the coolness of a veteran"WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved. TrendingHere are the facts and trivia that people are buzzing about. February 2021 Current Events: US News The Berlin Conference and the Partition of Africa The Implied Powers of Congress Noble Titles and Ranks in a Monarchy Keeping Your Brain Active in a COVID-19 World The Manchu Related Content Daily Word Quiz: invective Analogy of the Day: Today?s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language