Breadcrumb Home > Thesaurus > T Synonyms of tenable Find synonyms for: Adjective1. tenable, well-founded, reasonable (vs. unreasonable), sensibleusage: based on sound reasoning or evidence; "well-founded suspicions"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of tenable (Dictionary) ✖ Related Content Daily Word Quiz: deracinate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language