U1N1T1E1N1A1B3L1E1
11 points
UNTENABLE is validvalid
not tenable [adj] : UNTENABILITY [n], UNTENABLY [adv]
not tenable, also INTENABLE, INTENIBLE [adj UNTENABLY]
not tenable [adj] : UNTENABILITY [n], UNTENABLY [adv]
not tenable, also INTENABLE, INTENIBLE [adj UNTENABLY]