The word dielectrics 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™ Play In The Letters
Seven Letter Word Alert: (38 words)
circled, circles, circlet, clerics, clitics, credits, crested, critics, deceits, deciles, decries, deicers, deictic, deistic, deities, delicts, diciest, diester, dieters, dietics, dieties, directs, dirties, ditsier, eidetic, elicits, icicles, icteric, recited, recites, reedits, reslice, retiled, retiles, sidelit, siltier, sterile, tidiers