18-letter words containing a, g, p, n
- to stop at nothing — If you say that someone will stop at nothing to get something, you are emphasizing that they are willing to do things that are extreme, wrong, or dangerous in order to get it.
- to take the plunge — If you take the plunge, you decide to do something that you consider difficult or risky.
- transfer passenger — a traveller who changes from one plane, train, or bus to another, or to another form of transport
- transporter bridge — a bridge for carrying passengers and vehicles by means of a platform suspended from a trolley.
- 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.
- unpledged delegate — (in the US) a delegate at a national party convention who is free to vote for any candidate
- whispering gallery — a space or gallery beneath a dome or broad arch in which low sounds produced at any of certain points are clearly audible at certain other distant points.