Goofballs are commonly referred to as people who are silly or act in a foolish way. Some antonyms of goofballs are serious, sober, sensible, intelligent, wise, and astute. Serious people are focused and responsible, making them the opposite of goofy individuals. Sober people are calm, clear-headed, and rational, unlike goofballs who may behave unpredictably. Sensible people are sensible and pragmatic, while goofy individuals may act on impulses. Intelligent people are knowledgeable, with the ability to comprehend and generate ideas. Wise people possess, sagacity and prudence. Astute people are perceptive, keen and intuitive. These antonyms suggest a more mature, deliberate, and grounded approach to life, unlike the unpredictable and often outlandish behavior of goofballs.