Dunderpate is a word used to describe someone who is foolish or stupid. There are many synonyms for this word, and some of the most commonly used are: idiot, imbecile, dunce, simpleton, nincompoop, fool, blockhead, moron, nitwit, and dimwit. All of these words share the same meaning and can be used interchangeably with dunderpate. While these words are used to describe someone who is unintelligent, they can also be used playfully or in jest with someone who has made a silly mistake. It is essential to use such words with caution and respect for others' feelings as they can be perceived as derogatory.