ultr - valv
- ultra clean alloy
- ultra high frequency
- ultra high speed
- ultra horror weapons
- ultrafine fiber
- ultrahigh frequency band
- ultrahigh reliability
- ultrahigh speed motion picture photography
- ultrahigh temperature lubricant
- ultrahigh vacuum
- ultralightweight aluminum foam
- ultrashort waves
- ultrasonic irradiation
- ultrasonic radiation
- ultrasonic rail tester
- ultrasonics
- ultraviolet
- ultraviolet detection
- ultraviolet laser
- ultraviolet photography
- ultraviolet radiation
- ultraviolet radiation resistance
- ultraviolet signature
- ultraviolet spectrometer
- ultraviolet stellar magnitude
- umbilical
- umbilical attachment point
- umbilical cable
- umbilical connection unit
- umbilical cord
- umbilical line
- umbilical swing arm
- umbilical tower
- umbra
- umbrella antenna
- umbrella barrage
- umbrella cover
- umpire
- unacoustic zone
- unarmed
