The Collaborative International Dictionary
Supportableness
Supportable \Sup*port"a*ble\, a. [Cf. F. supportable.] Capable of being supported, maintained, or endured; endurable. -- Sup*port"a*ble*ness, n. -- Sup*port"a*bly, adv.
Wiktionary
supportableness
n. The state of being supportable.