The word sarcomeres 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: 16
Highest Scoring Words With Friends™ Play In The Letters sarcomeres
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Seven Letter Word Alert: (25 words)
acerose, amercer, amerces, careers, coarser, crasser, creamer, creaser, creases, crosser, erasers, mercers, racemes, reamers, rearose, recross, remorse, rescore, roamers, scarers, scorers, screams, seamers, smearer, soarers