(n.) The quality of being adequate; suitableness; sufficiency; adequacy.

acceptability adequacy adequateness admissibleness admission agreeability allowableness applicability appositeness appropriateness aptitude aptness assimilation common sense completeness comprehension comprehensiveness comprisal coverage defensibility eligibility embodiment embracement encompassment envisagement excusability exhaustiveness explainability explicability fairishness felicity fitness fittedness forgivableness goodishness hospitality inclusion inclusiveness incorporation invitingness justifiability justifiableness justness lawfulness legality legitimacy licitness logic logicality logicalness membership openness pardonableness participation passableness permissibility permissibleness plausibility propriety qualification rationality reason reasonability reasonableness reception receptiveness receptivity recipience relevance remissibility sanctionableness satisfactoriness sense sensibleness sound sense soundness sufficiency suitability sweet reason tenability tolerability tolerableness tolerance toleration unexceptionability unobjectionability validity veniality viability vindicability warrantableness whole