15-letter words containing p, r, o, s, l
- white corpuscle — white blood cell.
- wilson's petrel — a small petrel, Oceanites oceanicus, that breeds in the Southern Hemisphere but ranges into the North Atlantic and Pacific oceans.
- work oneself up — become overwrought
- xenotransplants — Plural form of xenotransplant.
- yorke peninsula — a peninsula in S Australia between Spencer Gulf and the Gulf of St. Vincent. 160 miles (257 km) long and 20–35 miles (32–56 km) wide.