unde - user
- undeclarerd
- undefined
- undeformed area
- undelete
- undeleted
- undeleting
- undeliverable
- undent
- undented
- undenting
- under any kind of engine failure
- under command aircraft
- under fair conditions
- under flight test
- under repair
- under temperature sensing element
- under vacuum
- under way aircraft
- under-frequency
- under-secretary
- under-wing tank
- underaerodrome utilities
- underbalance
- underbank
- underbanked
- underbanking
- underbelly
- undercarriage
- undercarriage bay
- undercarriage door
- undercarriage fairing
- undercarriage leg
- undercarriage lock
- undercarriage selector
- undercarriage strut
- undercast
- undercoating
- undercontrolling
- undercowl
- undercut relief
