15-letter words containing s, p, i, l, r
- 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.
- winter purslane — a plant, Montia perfoliata, native to western North America, of the purslane family, having edible, egg-shaped leaves and clusters of small, white flowers.
- withdrawal slip — a small paper form which has to be filled in before making a withdrawal of money from a bank, building society, etc
- 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.