The word diversionist 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: 18
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (83 words)
devisor, diorite, dirties, dissent, ditsier, diverts, divests, diviner, divines, divisor, dossier, doviest, drivein, edition, editors, inditer, indites, indorse, inosite, inserts, insider, insides, inverts, invests, invited, inviter, invites, invitro, iodines, iodiser, iodises, iodites, ionised, ioniser, ionises, iridise, ironies, ivories, ivorist, nitride, noisier, norites, nosiest, orients, oversit, revisit, rodents, roisted, rosiest, rosined, seniors, sinoids, sinters, snidest, snorted, sortied, sorties, steroid, stivers, stivier, stoners, stonier, storied, stories, strides, strived, striven, strives, tensors, tidiers, tierods, tinders, triones, vendors, verists, version, virions, viroids, visions, visited, visitor, vitrine, voiders