Yes, call is playable
...and is worth 9 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Call" Definition
noun
A demand for payment due on stock bought on margin when the value has shrunk.
A demand for payment of a debt.
A demand to submit bonds to the issuer for redemption before the maturity date.
A direction or series of directions rhythmically called out to square dancers.
idiom
Call a spade a spade To speak directly, precisely, and forthrightly.
Call it a day Informal To stop what one has been doing, for the remainder of the day or at least for the present.
Call it a night Informal To stop what one has been doing, for the remainder of the night.
Call it quits Informal To stop working or trying; quit.
Call names To speak to or about another in offensive terms.
phrasal-verb
Call back To communicate the need for (someone) to return from one situation or location to a previous one: Management called the laid-off workers back.
Call back To recall (a defective product) for repair: The company has called back all such models built in 1990.
Call back To telephone or radio (a person) who has called previously: I called her back at noon.
Call down To find fault with; reprimand: The teacher called me down for disobedience.
Call down To invoke, as from heaven.
verb-transitive
Games To equal the bet of (the preceding bet or bettor) in a poker game.
Sports To declare in the capacity of an umpire or referee: call a runner out; call a penalty for holding.
Sports To give the orders or signals for: a quarterback who called a poor play.
Sports To indicate a decision in regard to: calling balls and strikes; called a close play at home plate.
Sports To stop or postpone (a game) because of bad weather, darkness, or other adverse conditions.
verb-intransitive
To communicate or try to communicate with someone by telephone: I called twice, but no one answered.
To speak loudly; shout: a swimmer who was calling for help.
To utter a characteristic cry. Used of an animal: geese calling in early morning.
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