The word 'sapheads' can be used to describe someone who is foolish, dim-witted or stupid. However, there are a number of synonyms that can be used to describe such a person. Some of these synonyms include imbecile, nitwit, dolt, nincompoop, moron, simpleton, and dimwit. Other phrases that can be used to describe someone who lacks intelligence are 'intellectually challenged', 'mentally deficient', or 'cognitively impaired'. Although these terms may seem derogatory, it is important to remember that everyone has their own unique strengths and weaknesses, and one's level of intelligence should not be used to judge their worth as a person.