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