The word geriatrician 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: (37 words)
agatine, angrier, arraign, arrange, carinae, carnage, cartage, carting, certain, citrine, crating, cringer, earring, erratic, grainer, granite, granter, igniter, inciter, inertia, ingrate, narrate, rainier, rangier, ratrace, rearing, regrant, reicing, retrain, tanager, tangier, tarring, tearing, terrain, tiering, tracing, trainer