to take care of everything without consulting others; to run things all by oneself and not allow others to participate

a replacement item or substance used when the original is unavailable; something with similar properties used in place of another

a substitute or a replacement

acting in the place of one's parents; specifically used in legal contexts to refer to someone with parental responsibilities

a replacement or substitute for something; in commerce, an item that is interchangeable with another of the same type and quantity