The word digestibilities 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: 22
Highest Scoring Words With Friends™ Play In The Letters digestibilities
:
Seven Letter Word Alert: (35 words)
bedless, bedsits, besides, betides, betitle, bitsets, blessed, blissed, deities, delists, desilts, detests, diesels, dieties, dietist, digests, distils, ditties, edgiest, edibles, elegist, elegits, elitist, giblets, ileitis, settled, settles, sidelit, sledges, slitted, stilted, testbed, tidbits, tidiest, tieless