propriety

etiquette

civility, courteousness, courtesy, gentilesse, gentility, graciousness, mannerliness, politeness, politesse

dignity, grace, refinement

discretion, prudence

appropriateness, correctitude, correctness, decorousness, fitness, rightness, seemliness

attention, attentiveness, care, carefulness

character, goodness, high-mindedness, honesty, honor, integrity, morality, probity, rectitude, righteousness, straightness, uprightness, virtue, virtuousness

amenities, civilities, pleasantries

bearing, demeanor, deportment, mien

courtesy, decorum, mannerliness, politeness

formalities, protocol, rules

air, attitude, carriage, poise, polish, pose, posture, presence

custom, habit, pattern, practice (also practise), trick, way, wont

convention, fashion, mode, style

agreeableness, compatibility, congruity, harmoniousness

applicability, bearing, connection, justifiability, materiality, pertinence, relevance, relevancy, validity

acceptability, adequacy, adequateness, convenience, expedience, expediency, satisfactoriness, serviceableness, usefulness