The word dogmatises 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: 16
Highest Scoring Words With Friends™ Play In The Letters dogmatises
:
Seven Letter Word Alert: (28 words)
atomise, demasts, demists, diatoms, digests, dogsits, dosages, dotages, egoisms, egoists, egotism, gamiest, godetia, imagoes, mastoid, midgets, misdate, misdoes, misseat, mitoses, sagiest, seadogs, seamost, sigmate, somites, stigmas, stogies, stomies