(n.) The state or quality of being fit; as, the fitness of measures or laws; a person's fitness for office.

Hygeia ability ableness acceptability account adequacy admissibility advantage advantageousness advisability applicability appositeness appropriateness aptitude aptness auspiciousness becomingness beneficialness bloom caliber capability capableness capacity chargedness civility competence competency condition convenience correctitude correctness criticality crucialness decencies decency decorousness decorum desirability efficacy efficiency eligibility eligible emotional health expedience expediency facility faculty favorableness feasibility felicitousness felicity fettle fine fettle fittedness fittingness flair flush fruitfulness genius genteelness gentility glow good shape goodness happiness harmony health healthiness kilter loadedness mastery maturity meetness mental health niceness normality normativeness opportuneness order percentage pertinence physical condition physical fitness politicness pregnancy preparedness proficiency profit profitability properness propitiousness proprieties propriety prudence qualification readiness relevance repair righteousness rightness ripeness rosiness salubriousness salubrity seasonableness seasoning seemliness service serviceability shape sufficiency suitability suitableness suitedness susceptibility talent tempering the goods the stuff timeliness tone trim urbanity use usefulness utility vigor well-being what it takes wholesomeness wisdom worthiness worthwhileness