tailwind
From Longman Dictionary of Contemporary EnglishRelated topics: Meteorology, Transporttailwindtail‧wind /ˈteɪlˌwɪnd/ noun [countable] HEMTTa wind blowing in the same direction that something or someone is travelling → headwindExamples from the Corpustailwind• The twenty-knot tailwind helped, and their airspeed of two hundred knots reduced the journey to just over four hours.