The word heartbroken 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: 21
Highest Scoring Words With Friends™ Plays In The Letters heartbroken
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Seven Letter Word Alert: (23 words)
abortee, aborter, another, baronet, beneath, betoken, breaker, breathe, brother, earthen, enrober, hearken, hearten, norther, ornater, rebater, rebathe, retaken, retaker, rethank, terrane, thanker, thereon