(n.) Suitability to one's needs.

WC accommodate accommodation adaptability advantage advantageousness advisability amenity appliance appropriateness appurtenance auspiciousness avail backhouse basement bathroom behalf behoof beneficialness benefit can chargedness closet comfort comfort station commodiousness coziness crapper criticality crucialness cushioniness decency desirability drive ductility earth closet ease easiness engine enginery expedience expediency facility favor favorableness feasibility felicitousness fitness fittingness fixture flexibility free time freedom friendliness fruitfulness goof-off time handiness head homelikeness homeliness homeyness hospitality idle hours interest john johnny johnny house latrine lavatory leisure loadedness loo luxuriousness machine machinery malleability manageability manageableness maneuverability mechanical aid mechanical device mechanism meetness motive power motor necessary odd moments opportuneness outhouse peace peacefulness percentage pliability pliancy point politicness powder room power plant power source practicality pregnancy privy profit profitability propitiousness propriety prudence repose reposefulness rest rest room restfulness retirement rightness ripeness roominess seasonableness seemliness semiretirement service snugness softness spare time suitability throne time time to kill time to spare timeliness toilet toilet room untroublesomeness urinal use usefulness utility value warmness washroom water closet wieldableness wieldiness wisdom worth worthwhileness