Yes, hold is playable
...and is worth 8 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Hold" Definition
noun
A bond or force that attaches or restrains, or by which something is affected or dominated: a writer with a strong hold on her readership.
A control or adjustor on a television that keeps the screen image in proper position: adjusted the horizontal hold.
A direction or indication that something is to be reserved or deferred.
A manner of grasping an opponent, as in wrestling or aikido: a neck hold; an arm hold.
idiom
Get hold of To come into possession of; find: Where can I get hold of a copy?.
Get hold of To communicate with, as by telephone: tried to get hold of you but the line was busy.
Get hold of To gain control of. Often used reflexively: You must get hold of yourself!.
Hold sway To have a controlling influence; dominate.
Hold the bag Informal To be forced to assume total responsibility when it ought to have been shared.
phrasal-verb
Hold back To impede the progress of.
Hold back To restrain oneself.
Hold down To fulfill the duties of (a job): holds down two jobs.
Hold down To limit: Please hold the noise down.
Hold forth To talk at great length.
verb-transitive
To adjudge or decree: The court held that the defendant was at fault.
To aim or direct; point: held a hose on the fire.
To assemble for and conduct the activity of; convene: held a meeting of the board.
To assert or affirm, especially formally: This doctrine holds that people are inherently good.
To avoid letting out or expelling: The swimmer held her breath while underwater.
verb-intransitive
To be valid, applicable, or true: The observation still holds in cases like this.
To continue in the same direction: The ship held to an easterly course.
To halt an intended action. Often used in the imperative.
To have legal right or title. Often used with of or from.
To maintain a desired or accustomed position or condition: hopes the weather will hold.