| Tenable (a.) Capable of being held, maintained, or defended, as against an assailant or objector, or against attempts to take or process; as, a tenable fortress, a tenable argument. Thesaurus Entries OK, acceptable, admissible, agreeable, all right, alright, arguable, believable, colorable, conceivable, condonable, credible, creditable, defendable, defensible, excusable, fiduciary, good enough, imaginable, impregnable, justifiable, maintainable, okay, passable, plausible, possible, rational, reasonable, reliable, secure, supportable, trustworthy, trusty, unexceptionable, unimpeachable, unobjectionable, unquestionable, viable, vindicable, warrantable, workable, worthy of faith |