The word porterhouse 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: 17
Highest Scoring Words With Friends™ Play In The Letters porterhouse
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Seven Letter Word Alert: (43 words)
heptose, heteros, hotspur, hurters, poorest, porters, posture, pothers, pourers, pouters, presort, rehouse, reports, reposer, repours, reroots, reroute, reshoot, reshore, restore, retours, rhetors, rooster, rooters, routers, shooter, shorter, shouter, soother, spouter, spurter, stooper, strophe, torpors, toupees, tourers, trooper, trouper, troupes, trouser, uproots, ureters, usherer