Yes, hack is playable
...and is worth 13 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Hack" Definition
noun
A carriage or hackney for hire.
A horse used for riding or driving; a hackney.
A rough, irregular cut made by hacking.
verb-transitive
Informal To alter (a computer program): hacked her text editor to read HTML.
Slang To cut or mutilate as if by hacking: hacked millions off the budget.
To break up the surface of (soil).
To cut or chop with repeated and irregular blows: hacked down the saplings.
To let out (a horse) for hire.
verb-intransitive
Informal To write or refine computer programs skillfully.
To chop or cut something by hacking.
To cough roughly or harshly.
To drive a taxicab for a living.
To ride on horseback at an ordinary pace.
verb
To cut or sever with repeated irregular or unskillful blows.
To cut or shape by or as if by crude or ruthless strokes.
To clear or make by or as if by cutting away vegetation.
To make chopping strokes or blows.
adjective
By, characteristic of, or designating routine or commercial writing: hack prose.
Working for hire especially with mediocre professional standards.
Performed by, suited to, or characteristic of a hack.
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