The word shrinkable 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™ Play In The Letters shrinkable
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Seven Letter Word Alert: (28 words)
arshine, balkers, balkier, bankers, bearish, bilkers, blinker, breakin, brisken, hankers, hankies, harkens, herbals, hernial, hernias, inhaler, inhales, lankier, larkish, lesbian, linkers, nailers, relinks, renails, shakier, shalier, skiable, snakier