The word deviationist 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: (45 words)
adonise, advents, anodise, attends, avidest, dentist, destain, detains, deviant, dietist, distant, ditties, dittoes, divines, donates, dotiest, doviest, edition, evasion, indites, inosite, instate, instead, invades, invited, invites, iodines, iodites, ionised, naivest, natives, notated, sainted, snotted, stained, station, stative, stinted, tainted, tidiest, tiniest, toasted, vainest, visited, vitiate