The word veterinarian 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™ Plays In The Letters
Seven Letter Word Alert: (28 words)
arenite, averter, entrain, inerter, inertia, invitee, inviter, narrate, nervier, nirvana, nitrene, rainier, reinter, retrain, riveter, tearier, terrain, terrane, tinnier, trainee, trainer, triaene, variant, variate, veinier, veteran, vintner, vitrine