When it comes to describing someone who has good manners and behaves in a courteous and respectful manner, there are several synonyms that can be used instead of "politest." These include "courteous," "gracious," "considerate," "civil," "respectful," and "well-mannered." Other possible synonyms may include "diplomatic," "charming," "cultured," "decent," "gentle," "kind," "tactful," "thoughtful," and "urbane." Each of these words can effectively convey the qualities of someone who is polite without necessarily using the word "politest." Whether writing a formal letter or having a conversation with a colleague, choosing the right synonym can help to convey one's intended message in a clear and effective manner.