An unrestrained attack is a violent or aggressive action taken without any restraint or control. Synonyms for an unrestrained attack include a fierce assault, a brutal onslaught, a savage attack, an uncontrolled rampage, and a reckless onslaught. These terms all describe an attack that is carried out without any regard for the safety or wellbeing of others. Other synonyms for this type of attack include a wild attack, a frenzied assault, and a vicious onslaught. All of these terms suggest a violent and dangerous attack that is carried out with intense force and aggression. When dealing with an unrestrained attack, it is important to stay calm and take appropriate measures to protect yourself and others from harm.