The word autoradiography 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: 26
Highest Scoring Words With Friends™ Play In The Letters autoradiography
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Seven Letter Word Alert: (36 words)
adaptor, agatoid, airdrop, airport, aphagia, atrophy, atropia, auditor, autopod, daytrip, digraph, doughty, draught, dropout, drought, grayout, gyrator, hardtop, oratory, outdrag, outpray, outroar, parotid, paydirt, portray, prodigy, prodrug, protura, prurigo, radiary, roadhog, thyroid, topiary, typhoid, upright, yoghurt