contrail

As a letter s

is the letter s with a.

As a noun contrail is

an artificial cloud made by the exhaust of jet aircraft or wingtip vortices that precipitate a stream of tiny ice crystals in moist, frigid upper air.

As a noun contrail

is an artificial cloud made by the exhaust of jet aircraft or wingtip vortices that precipitate a stream of tiny ice crystals in moist, frigid upper air.

As a proper noun chantal is

.

As nouns the difference between contrail and jetstream

is that contrail is an artificial cloud made by the exhaust of jet aircraft or wingtip vortices that precipitate a stream of tiny ice crystals in moist, frigid upper air while jetstream is an alternative spelling of jet stream.

As nouns the difference between taxonomy and contrail

is that taxonomy is the science or the technique used to make a classification while contrail is an artificial cloud made by the exhaust of jet aircraft or wingtip vortices that precipitate a stream of tiny ice crystals in moist, frigid upper air.

Contrail is an antonym of distrail.

As nouns the difference between contrail and distrail

is that contrail is an artificial cloud made by the exhaust of jet aircraft or wingtip vortices that precipitate a stream of tiny ice crystals in moist, frigid upper air while distrail is a clear path through a cloud created by a passing aircraft, caused either by evaporation or freezing of water droplets in the wake.