13-Letter Words Containing: __ACK

• To play the position of quarterback.

• (by extension) To lead a team or group; to be primarily responsible for some group project or activity.

• the process whereby hydrocarbon molecules of petroleum are broken down into kerosene and gasolene by the addition of hydrogen under high pressure in the presence of a catalyst

• anything immaterial that severely hinders or confines

• a garment similar to a jacket that is used to bind the arms tightly against the body as a means of restraining a violent person

• ornamental objects of no great value