Yes, star is playable
...and is worth 4 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Star" Definition
noun
A graphic design having five or more radiating points, often used as a symbol of rank or merit.
A planet or constellation of the zodiac believed in astrology to influence personal destiny.
A self-luminous celestial body consisting of a mass of gas held together by its own gravity in which the energy generated by nuclear reactions in the interior is balanced by the outflow of energy to the surface, and the inward-directed gravitational forces are balanced by the outward-directed gas and radiation pressures.
A white spot on the forehead of a horse.
An artistic performer or athlete whose leading role or superior performance is acknowledged.
adjective
Of or relating to a star or stars.
Outstanding or famous, especially in performing something: a star researcher; a star figure skater.
Of outstanding excellence.
Of, relating to, or being a star.
idiom
See stars To experience bright, flashing sensations, as from a blow to the head.
verb-transitive
To award or mark with a star for excellence.
To mark with an asterisk.
To present or feature (a performer) in a leading role.
verb-intransitive
To do an outstanding job; perform excellently.
To play the leading role in a theatrical or film production.
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