WAeolipile
WAqueduct (bridge)
WAqueduct (water supply)
WArchimedes' screw
WArmillary sphere
WBanknote
WClock tower
WComedy (drama)
WCompass
WCotton gin
WCrane (machine)
WDistillation
WEscapement
WFood steamer
WHeron's fountain
WHierapolis sawmill
WHippocratic bench
WHydraulics
WHydraulis of Dion
WHypocaust
WClothes iron
WLiquor
WPump
WRoman concrete
WRudder
WSteam cannon
WSundial
WTeeth-cleaning twig
WToilet
WToothbrush
WTragedy
WVending machine
WWater organ
WWater wheel
WWatermill