Impatient of control refers to a person or situation that cannot be easily controlled or managed. Synonyms for this phrase could include "challenging to handle," "stubborn," "difficult to contain," "unruly," "unmanageable," "wild," "untamed," "out of control," "rebellious," and "disobedient." These words all convey the idea that the situation at hand is not easily controlled or managed, and requires a great deal of effort and skill to bring under control. Whether referring to a person or a situation, these synonyms highlight the importance of patience, perseverance, and careful planning when dealing with something that is impatient of control.