Cabezon is a Spanish word that translates to "big head" in English. Though it is a commonly used term, there are various synonyms for this word that one can use to describe someone with a big head. Some of the synonyms include "blockhead," "bullhead," "thickhead," "dunce," "dimwit," "dolt," and "idiot." Each of these synonyms carries a particular connotation, from sheer stupidity to stubbornness or a refusal to think critically. So if you're looking for an alternative to this term, consider using one of these alternative words to add a particular flavor or tone to your description.