23-letter words containing d, r, o, p, c, l
- turn-and-slip indicator — bank-and-turn indicator.
- volumetric displacement — the volume of air per revolution that passes through a mechanical pump when the pressure at the intake and the exhaust is the same as that of the atmosphere
- wind cave national park — a national park in SW South Dakota. 41½ sq. mi. (107 sq. km).