The term 'well-mannered' can be described by the crossword solutions of GENTEEL (7 letters), POLITE (6 letters), CIVIL (5 letters), POLISHED (8 letters), NICE (4 letters), good (4 letters), and RESPECTFUL (10 letters). GENTEEL means having a courteous or refined manner, POLITE implies having good manners and showing respect for others, CIVIL means having or showing behavior that is RESPECTFUL and considerate of others, POLISHED suggests having a smooth and sophisticated manner, NICE implies having a kind and pleasant disposition, good implies having qualities that are considered desirable or positive, and RESPECTFUL implies showing deference and regard for others. All of these words together describe someone who is well-mannered.