The word "puddinghead" is typically used to describe someone who is foolish or slow-witted. If you're looking for synonyms for this word, there are a few options to consider. For example, you might use the word "simpleton" to describe someone who lacks intelligence or common sense. "Dunce" is another option that implies foolishness or ignorance. Other synonyms for "puddinghead" might include "dim-witted," "dense," or "stupid." Ultimately, the best synonym will depend on the context in which the word is being used and the specific shades of meaning that you want to convey.