vertical speed (rate of descent, ROD)

rate of descent (ROD) / vertical speed

rate of descent (ROD)

instantaneous vertical speed indicator / instantaneous vertical-speed indicator (IVSI)

rate of climb (ROC) / vertical speed

vertical speed (rate of climb, ROC)

descent

autorotative descent of an rotorcraft

descent weather

minimum descent altitude

minimum descent height

airborne descent

line descent brake

vertical speed indicator (VSI)

vertical lapse rate

supersonic speed (exceeds speed of sound / Mach 1)

variable-speed with speed control

cruise speed / cruising speed

Nr gauge (Nr = speed of rotation) / rotor speed sensor

buffer and operating-rod group

cleaning rod

connecting rod (conrod)

enclosed firing rod

lightning discharger (rod)

long-rod penetrator

mine probe / probing rod

operating rod assembly

operating rod group

probing rod / probe

rod

telescopic rod antenna

tie rod

tie rod end