Yes, course is playable
...and is worth 10 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Course" Definition
noun
A complete body of prescribed studies constituting a curriculum: a four-year course in engineering.
A continuous layer of building material, such as brick or tile, on a wall or roof of a building.
A mode of action or behavior: followed the best course and invested her money.
A part of a meal served as a unit at one time: The first course was a delicious soup.
A point on the compass, especially the one toward which a vehicle, such as a ship, is moving.
idiom
In due course At the proper or right time.
Of course In the natural or expected order of things; naturally.
Of course Without any doubt; certainly.
verb-transitive
To hunt (game) with hounds.
To move swiftly through or over; traverse: ships coursing the seas.
To set (hounds) to chase game.
verb-intransitive
To hunt game with hounds.
To proceed or move swiftly along a specified course: "Big tears now coursed down her face” ( Iris Murdoch).
verb
To hunt or pursue (game) with hounds.
To cause (dogs) to run (as after game).
To run or move swiftly through or over.
To run or pass rapidly along or as if along an indicated path.
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