- A railway that operates on a raised structure in order to permit passage of vehicles or pedestrians beneath it.高架铁道：一条位于高架建筑上的铁路，以使车辆或行人在下面通过
- double-team
- doublethink
- doublethinks
- double time
- double-time
- doubleton
- double-tongue
- doubletons
- doubletree
- doublets
- double-u
- double vision
- doublewide
- doubleword
- double–barreled
- double–barrelled
- double–breasted
- double–check
- double–click
- double–cross
- double–dealing
- double–decker
- double–digit
- double–edged
- double–faced