Cumbrousness refers to something that is difficult to handle due to its size, weight, or complexity. Some synonyms for the word cumbrousness include unwieldiness, ponderousness, bulkiness, clumsiness, and heftiness. These words describe objects or tasks that are challenging to manage and can cause inconvenience or discomfort when handling. Other synonyms for cumbrousness include awkwardness, cumbersomeness, and ungainliness. These words are commonly used to describe objects that are too large to easily transport or tasks that require significant effort to complete. Overall, cumbrousness and its synonyms point towards items or situations that are cumbersome and difficult to deal with.