The word restaurants 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: 13
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (41 words)
arrests, astuter, attunes, aurates, entrust, errants, narrate, natters, natures, nursers, nutters, ranters, rasters, ratters, restart, returns, saunter, searats, seastar, snarers, starers, starter, staters, statues, stature, stratas, stratus, stunter, sunstar, tartans, tartars, tasters, taunter, tautens, tetanus, truants, truster, turners, turrets, unrests, unseats