The word photometrist 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: 20
Highest Scoring Words With Friends™ Plays In The Letters photometrist
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Seven Letter Word Alert: (59 words)
hermits, heroism, hitters, homiest, hotpots, hotspot, hottest, imports, imposer, isotope, metrist, moister, moorish, mopiest, mortise, mothers, mottoes, omitter, oosperm, permits, pettish, poorest, pothers, potshot, potters, potties, primost, promise, promote, protest, protist, reshoot, risotto, ropiest, rosehip, shitpot, shooter, smother, soother, sootier, spotter, stomper, stooper, strophe, thermos, thorite, tipmost, tipster, tiptoer, tiptoes, tithers, titters, tomtits, tooters, tootsie, topmost, toprims, totters, tropist