18-letter words containing o, p, u, g, n, a
- shunting operation — an operation in which rail coaches are manoeuvred
- sound spectrograph — an electronic device for recording a sound spectogram.
- spackling compound — spackle
- spaghetti junction — an interchange, usually between motorways, in which there are a large number of underpasses and overpasses and intersecting roads used by a large volume of high-speed traffic
- summary proceeding — a mode of trial authorized by statute to be held before a judge without the usual full hearing.
- super giant slalom — a slalom race in which the course is longer and has more widely spaced gates than in a giant slalom.
- supporting actress — an actress playing a supporting role
- sustaining program — a radio or television program without a commercial sponsor.
- to take the plunge — If you take the plunge, you decide to do something that you consider difficult or risky.
- 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.
- universal coupling — a coupling between rotating shafts set at an angle to one another, allowing for rotation in three planes.