The word ravellings 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: 19
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (32 words)
aligner, anglers, erasing, gainers, genials, girnels, gravels, gravies, grilles, learing, leasing, leaving, lingers, nailers, rallies, ravines, ravings, realign, reaving, regains, renails, salving, sealing, searing, selling, serving, slaving, slinger, vearing, versing, village, vinegar