The word transformer 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 transformer
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Seven Letter Word Alert: (46 words)
anomers, armorer, armrest, artsmen, atoners, enamors, errants, farmers, farmost, foamers, foments, foramen, forearm, foreman, formats, formers, framers, fraters, froster, maestro, marrers, martens, matrons, mentors, meronts, moaners, monster, mortars, netform, oarsmen, ornater, rafters, ranters, reforms, reroast, roamers, roarers, roaster, senator, smarten, smarter, snorter, terrors, tonearm, treason, tremors