(n.) The quality of being courteous; politeness; courtesy.

accommodation act of courtesy advantage affability agreeability agreeableness amiability amicability appliance appurtenance attention attractiveness betterment bliss blissfulness charm civilities civility comfort comity compatibility complaisance congeniality considerateness convenience cordiality courteousness courtesy deference delightfulness enhancement enjoyableness enrichment etiquette excellence extravagance facility fascination favor felicitousness frill gallantry geniality goodliness goodness graceful gesture gracefulness graciousness gratefulness harmoniousness improvement mellifluousness mellowness merit mores niceness pleasance pleasantness pleasantry pleasingness pleasurability pleasurableness pleasure pleasurefulness polite act politeness proprieties quality rapport respect respectfulness sociability solicitousness solicitude superfluity sweetness sweetness and light tact tactfulness thoughtfulness urbanity virtue welcomeness