The word disturbingly 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: 23
Highest Scoring Words With Friends™ Plays In The Letters disturbingly
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Seven Letter Word Alert: (41 words)
birding, bitings, bristly, budling, burling, burying, busgirl, busting, busying, dignity, dingily, dirtily, disturb, dustbin, dustily, dusting, gristly, gustily, listing, liturgy, lusting, nitryls, ridings, rigidly, rulings, rustily, rusting, sibling, sidling, silting, sliding, stringy, styling, suiting, sunbird, synurid, tidings, tidying, tilings, tubings, unsilty