The Collaborative International Dictionary
Endurableness
Endurable \En*dur"a*ble\, a. [Cf. OF. endurable. See Endure.]
Capable of being endured or borne; sufferable.
--Macaulay. --
En*dur"a*ble*ness, n.
Wiktionary
endurableness
n. (context rare English) The state of being endurable; endurability.