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

• extremely high fever (especially in children)

• extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds

• a group of viruses including those causing mumps and measles

• red pigment in red algae

• of or relating to cryptanalysis

• brain surgery on human patients intended to relieve severe and otherwise intractable mental or behavioral problems

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