Writing & Editing Supposedly, ‘supposably’ is a word, but is it? A look at the correct way to use these two adverbs. By Denise C. BaronDec. 17, 2010 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.