The word microphotometer 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: 29
Highest Scoring Words With Friends™ Play In The Letters microphotometer
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Seven Letter Word Alert: (68 words)
cheerio, chimere, chirper, chomper, coherer, compere, compete, comport, compote, coterie, crimper, critter, emitter, emperor, emptier, epithet, epitome, erector, etheric, heretic, homomer, memetic, memoire, microhm, miterer, moocher, morphic, omitter, oophore, ototome, percher, pettier, piercer, pitcher, porotic, portico, potiche, premier, preterm, proctor, promote, prootic, protect, receipt, rechime, reciter, remoter, reperch, repitch, reprice, reprime, retimer, roomier, rototom, tempore, tempter, termite, theorem, thereto, thermic, thorite, tiptoer, treetop, trimmer, trireme, trochee, trooper, trophic