The word pediatrist 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: 14
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (52 words)
airiest, airside, aridest, artiest, aspired, astride, attired, attires, dairies, departs, despair, diapers, diaries, diarist, dietist, dirties, disrate, ditsier, ditties, iratest, irisate, parties, pastier, patters, patties, petards, piarist, pietist, pirated, pirates, pitiers, praised, riptide, spatted, spatter, spirted, spitted, started, stipite, striate, striped, tapirid, tapster, tastier, tiderip, tidiers, tidiest, tipsier, tipster, tirades, traipse, tripeds