1. 7 synonyms for Courteousness: civility, courtesy, genteelness, gentility, mannerliness, politeness, politesse

2. Antonyms for Boorishness include courteousness, gentility, politeness, civility, courtesy, graciousness, genteelness, mannerliness, considerateness and politesse

3. Synonyms for Courteousness include civility, courtesy, genteelness, gentility, graciousness, mannerliness, politeness, consideration, gallantry and manners