Well-mannered is often used to describe someone who is polite and courteous in their behavior towards others. But there are plenty of other words that can be used to describe this quality. For example, courteous, gracious, polite, and genteel all convey a similar meaning. Similarly, someone who is well-behaved can also be described as poised, polished, or refined, indicating a high level of social skills and grace. Other synonyms for well-mannered might include civilized, urbane, or elegant, all of which point to a sense of sophistication and refinement in one's behavior. Ultimately, there are many different words that can be used to describe someone who is well-mannered, each of which captures a slightly different nuance or aspect of this important quality.