The word antechamber is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 23
Highest Scoring Words With Friends™ Play In The Letters antechamber
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Seven Letter Word Alert: (35 words)
abreact, acerate, archean, beermat, beneath, breathe, cabaret, carbeen, carbene, chamber, chanter, cheater, crabman, cremate, earache, earthen, emanate, embrace, hearten, hectare, hetaera, macabre, machete, manatee, matcher, methane, rebatch, rebathe, recheat, reenact, rematch, reteach, teacher, trachea, tranche