Yes, sail is playable
...and is worth 5 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Sail" Definition
noun
Nautical A piece of fabric sewn together and fitted to the spars and rigging of a vessel so as to convert the force of the wind into forward motion of the vessel.
Nautical A sailing vessel.
Nautical A trip or voyage in a sailing craft.
Nautical The sails of a ship or boat.
Nautical The superstructure of a submarine.
verb-intransitive
Nautical To move across the surface of water, especially by means of a sailing vessel.
Nautical To operate a sailing craft, especially for sport.
Nautical To start out on such a voyage or journey.
Nautical To travel by water in a vessel.
To move along or progress smoothly or effortlessly: sailed into the room five minutes late; sailed through the exam; sailed through the red light.
verb-transitive
Nautical To navigate or manage (a vessel).
Nautical To voyage upon or across: sail the Pacific.
phrasal-verb
Sail into To attack or criticize vigorously: sailed into the workmen for the shoddy job they were doing.
verb
To travel on water in a ship.
To travel on water by the action of wind upon or by other means.
To move or proceed easily, gracefully, nonchalantly, or without resistance .
To move through the air .
To begin a water voyage .
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