18-letter words containing p, o, l, n
- traditional option — an option that once purchased cannot be resold
- traditional policy — a life assurance policy in which the policyholder's premiums are paid into a general fund and his or her investment benefits are calculated according to actuarial formulae
- traditional weapon — a weapon having ceremonial tribal significance, such as an assegai or knobkerrie
- unit magnetic pole — the unit of magnetic pole strength equal to the strength of a magnetic pole that repels a similar pole with a force of one dyne, the two poles being placed in a vacuum and separated by a distance of one centimeter.
- unit-linked policy — a life-assurance policy, the investment benefits of which are directly in proportion to the number of units in a unit trust purchased on the policyholder's behalf
- universal coupling — a coupling between rotating shafts set at an angle to one another, allowing for rotation in three planes.
- up someone's alley — suited to someone's tastes or abilities
- up to one's elbows — the bend or joint of the human arm between upper arm and forearm.
- upper partial tone — overtone (def 1).
- wattless component — Electricity. reactive component.
- western isles pony — a breed of large pony, typically grey, with a dense waterproof coat. The only surviving variety is the Eriskay pony
- wild passionflower — the maypop, Passiflora incarnata.
- wilson's phalarope — a phalarope, Phalaropus tricolor, that breeds in the prairie regions of North America and winters in Argentina and Chile.
- wireless telephone — Now Rare. radiotelephony.
- wireless telephony — Now Rare. radiotelephony.
- 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).