The word photomicrograph 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: 33
Highest Scoring Words With Friends™ Play In The Letters photomicrograph
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Seven Letter Word Alert: (28 words)
agitpop, airport, apricot, camphor, carport, chariot, choragi, compart, comport, corpora, graphic, haricot, hightop, morphic, oghamic, porotic, portico, potamic, proctor, program, prootic, rapport, taproom, toparch, triarch, trigram, trochar, trophic