TAILWIND
tailwind
(noun) wind blowing in the same direction as the path of a ship or aircraft
Source: WordNet® 3.1
Etymology
Noun
tailwind (plural tailwinds)
(nautical) a wind that blows in the same direction as the course of an aircraft or ship
Antonyms
• headwind
Verb
tailwind (third-person singular simple present tailwinds, present participle tailwinding, simple past and past participle tailwinded)
Of wind, to blow on a windmill or wind turbine in such a way that wind pressure is exerted on the wrong side of the sail or turbine assembly.
Source: Wiktionary