Most foolheaded can be described as a term used for someone or something with thoughtless or irrational behavior. However, its antonyms refer to individuals who are wise or prudent, cautious or sensible. Words like sensible, practical, smart, astute, shrewd, can be used to describe people with a wise or judicious character. Similarly, the words logical, sensible, rational, reasonable, can be used to explain someone with a prudent behavior. In short, in contrast to most foolheaded, antonyms focus on people or things that exhibit sagacious or thoughtful behavior.