WAirbag
WAnscombe's quartet
WAzatadine
WCanadian comfort cab
WChevaline
WDoomsday rule
WGenetically modified organism
WGoldwater rule
WNassau Inter-County Express
WMagnetic resonance imaging
WMecanum wheel
WNational Building Specification
WRosa 'Charles Austin'
WRosa 'Lilian Austin'
WRosa 'Sunsprite'
WU.S. Dollar Index
WWang 2200