Yes, cast is playable
...and is worth 7 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Cast" Definition
noun
A conjecture; a forecast.
A direction or expression of the eyes.
A pair of hawks released by a falconer at one time. See Synonyms at flock1.
A rigid dressing, usually made of gauze and plaster of Paris, used to immobilize an injured body part, as in a fracture or dislocation. Also called plaster cast.
phrasal-verb
About To devise means; contrive.
About To make a search; look: had to cast about for an hour, looking for a good campsite.
Cast off Printing To estimate the space a mansucript will occupy when set into type.
Cast off To discard; reject: cast off old clothing.
Cast off To let go; set loose: cast off a boat; cast off a line.
verb-intransitive
Nautical To put about; tack.
Nautical To veer to leeward from a former course; fall off.
Obsolete To estimate; conjecture.
To add a column of figures; make calculations.
verb-transitive
Nautical To turn (a ship); change to the opposite tack.
To assign a certain role to (an actor): cast her as the lead.
To assign an actor to (a part): cast each role carefully.
To bestow; confer: "The government I cast upon my brother” ( Shakespeare).
To calculate astrologically: cast my horoscope.
verb
To cause to move or send forth by throwing.
To place as if by throwing.
To deposit (a ballot) formally.
We love the game of Scrabble®, which is why we created Free Scrabble Dictionary - a simple lookup tool to check if the word you want to play is valid in the game of Scrabble®. At the top of every page, you can enter your word and click "Search Dictionary." We'll let you know whether your word is playable and provide a few definitions as well.