Yes, feather is playable
...and is worth 12 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Feather" Definition
noun
A feather-shaped flaw, as in a precious stone.
A feathery tuft or fringe of hair, as on the legs or tail of some dogs.
A strip, wedge, or flange used as a strengthening part.
A wedge or key that fits into a groove to make a joint.
Character, kind, or nature: Birds of a feather flock together.
idiom
Fine In excellent form, health, or humor.
verb-transitive
To alter the pitch of (a propeller) so that the chords of the blades are parallel with the line of flight.
To alter the pitch of (the rotor of a helicoptor) while in forward flight.
To connect with a tongue-and-groove joint.
To cover, dress, or decorate with or as if with feathers.
To fit (an arrow) with a feather.
verb-intransitive
To grow feathers or become feathered.
To move, spread, or grow in a manner suggestive of feathers.
verb
To furnish (as an arrow) with a feather.
To cover, clothe, or adorn with or as if with.
To turn (an oar blade) almost horizontal when lifting from the water at the end of a stroke to reduce air resistance.
To change the angle of (airplane propeller blades) so that the chords become approximately parallel to the line of flight.
To change the angle of airplane propeller blades of (an engine) in such a manner.
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