13-Letter Words Containing: I,R,R,Y

• extremely high fever (especially in children)

• a group of viruses including those causing mumps and measles

• an instrument that indicates whether two periodic motions are synchronous (especially an instrument that enables a pilot to synchronize the propellers of a plane that has two or more engines)

• 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

• red pigment in red algae

• of or relating to cryptanalysis

• (of an organ or body part) excessively enlarged as a result of increased size in the constituent cells