The word keyboardist 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 keyboardist
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Seven Letter Word Alert: (57 words)
abiders, aborted, airbeds, aridest, astride, astroid, baiters, barites, batiked, batiker, batoids, bedirts, bedirty, bestrid, betrays, boasted, boaster, boaters, borates, boysier, braised, brisked, brisket, byroads, darkest, debarks, debtors, deorbit, destroy, dietary, disobey, disrate, disrobe, editors, karites, obesity, orbited, rebaits, reboast, roadies, roasted, roisted, seabird, sidebar, skirted, sorbate, sorbite, sortied, steroid, storied, strayed, streaky, strobed, stroked, tierods, tirades, troikas