18-letter words containing p, i, r, a, o
- warehouse capacity — the amount of storage space in a warehouse
- wild passionflower — the maypop, Passiflora incarnata.
- wildlife programme — (esp on television) a documentary whose subject is wild animals in their natural habitat or undomesticated fauna and flora generally
- wilson's phalarope — a phalarope, Phalaropus tricolor, that breeds in the prairie regions of North America and winters in Argentina and Chile.
- withdrawal symptom — effects of stopping a drug
- women at point sur — a narrative poem (1927) by Robinson Jeffers.
- world championship — an international competition in a particular sport or activity for people all around the world
- zion national park — a park in SW Utah. 148 sq. mi. (383 sq. km).