The antonyms for the word "acting in place of" are independent, self-sufficient, autonomous, and self-reliant. These words describe a person or thing that has full control and does not rely on anyone else to take their place. The opposite of acting in place of is to be self-assured and capable of standing on their own two feet. These antonyms can be used to describe a person who is confident and competent in their abilities, or a thing that is self-sufficient and able to function without assistance. In conclusion, by using these antonyms, we can describe the opposite of "acting in place of" and convey a different meaning.