Blockishness is a term used to describe someone who is slow-witted, clumsy or unrefined in their behavior. There are many synonyms for this word that can be used to describe someone with these characteristics. Some of the common synonyms of blockishness include obtuseness, dullness, insensitivity and clumsiness. Other words that can be used to describe this trait include coarseness, heavy-handedness, ineptitude, awkwardness, and clumsiness. These words paint a picture of someone who is not very graceful in their actions or communication style. It is important to remember that these words should not be used to insult anyone but rather as a way to describe a particular behavior.