Blunder-heads is a term that refers to individuals who make careless mistakes or errors. However, there are numerous synonyms that can be used in place of blunderheads. For example, someone who is prone to making foolish mistakes might be referred to as a bungler, a numskull, a goofball, a klutz, or a dimwit. A blunderheaded person might also be called a scatterbrain, an incompetent, a fool, a dolt, or a nitwit. Similarly, a clumsy person might be referred to as a stumblebum, a butterfingers, a buffoon, a doofus, or a simpleton. Regardless of the term used, all of these synonyms describe individuals who are prone to making mistakes or errors in judgment.