Open English Wordnet
Nouns
(n)rationality, reason, reasonablenessthe state of having good sense and sound judgment“his rationality may have been impaired”, “he had to rely less on reason than on rousing their emotions”
(n)reasonablenessgoodness of reason and judgment“the judiciary is built on the reasonableness of judges”
(n)reasonableness, moderateness, modestnessthe property of being moderate in price or expenditures“the store is famous for the reasonableness of its prices”, “the modestness of the living standards here becomes obvious immediately”
(n)reasonablenessmoderation in expectations“without greater reasonableness by both parties we will never settle this matter!”
(n)reasonableness, tenability, tenablenessthe quality of being plausible or acceptable to a reasonable person“he questioned the tenability of my claims”