(n.) Propriety of manner or conduct; grace arising from suitableness of speech and behavior to one's own character, or to the place and occasion; decency of conduct; seemliness; that which is seemly or suitable.

amenities appropriateness becomingness bienseance ceremoniousness civilities civility comity conformity convenance convention conventional usage conventionalism conventionality correctitude correctness courtliness custom decencies decency decorousness delicacy deportment dignity diplomatic code elegance elegancies etiquette exquisite manners felicity fitness fittingness form formalities formality genteelness gentility good form good manners goodness happiness mannerliness manners meetness modesty mores natural politeness niceness normality normativeness order orderliness point of etiquette politeness politesse properness proprieties propriety protocol pudency pudicity punctilio quiet good manners respectability righteousness rightness rules of conduct seemliness shame social code social conduct social convention social graces social procedures social usage solemnity suitability urbanity usage