The antonyms for the word "more thick-headed" include words like intelligent, smart, astute, clever, quick-witted, sharp, brainy, and ingenious. These words are the complete opposite of thick-headedness and portray individuals who are highly skilled in their thinking process. Unlike thick-headedness, these qualities are highly valued in today's society, especially in academic and professional settings. Individuals who possess these traits are highly respected and sought after. They possess the ability to solve complex problems, make strategic decisions, and outsmart their competition. In conclusion, it is a desirable quality to be intelligent and sharp-minded rather than being thick-headed.