The word heartbreaks 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: 20
Highest Scoring Words With Friends™ Plays In The Letters heartbreaks
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Seven Letter Word Alert: (41 words)
abaters, abraser, abreast, aerates, barkers, barters, bathers, beakers, bearers, beaters, berates, berserk, brasher, breaker, breathe, breaths, hearers, heaters, hetaera, reakers, rebakes, rebater, rebates, rebathe, rebaths, rehears, reheats, reshake, reshare, restake, retaker, retakes, retears, serrate, sharker, shearer, sherbet, starker, taskbar, tearers, trasher