The word pediatrists 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: 15
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (80 words)
airiest, airside, aridest, artiest, artists, aspired, aspires, astride, attired, attires, dairies, daisies, departs, despair, diapers, diaries, diarist, dietist, dirties, disrate, ditsier, ditties, iratest, irisate, paresis, parties, pasters, pastier, pasties, patters, patties, persist, petards, piarist, pietist, pirated, pirates, pissier, pitiers, praised, praises, priests, rapists, repasts, riptide, satires, sitters, spaders, sparest, spatted, spatter, spiders, spireas, spirits, spirted, spitted, spreads, spriest, sprites, started, staters, stipite, straits, striate, strides, striped, stripes, tapirid, tapster, tasters, tastier, tiderip, tidiers, tidiest, tipsier, tipster, tirades, traipse, tripeds, tsarist