15-Letter Words Containing: I,R,R,E,R,S,_

• having elaborate symmetrical ornamentation

• To prescribe a drug more frequently than appropriate

• organize as a territory

• place on a territorial basis

• extend by adding territory

• an unincorporated business owned by a single person who is responsible for its liabilities and entitled to its profits

• a person who is an authority on history and who studies it and writes about it

• integrated circuit semiconductor chip that performs the bulk of the processing and controls the parts of a system

• the quality of being irreversible (once done it cannot be changed)