The word "uncouthnesses" refers to behavior or manners that are considered crude, unrefined, or awkward. Some synonyms for this word include rudeness, clumsiness, boorishness, or vulgarity. These words are all used to describe actions or mannerisms that are unbecoming or impolite. Another synonym for uncouthnesses is uncivilizedness, which implies a lack of sophistication or culture. Overall, these synonyms can be used interchangeably with uncouthnesses to describe behavior or actions that are considered inappropriate or unacceptable in polite society.