The word babysitters 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: 19
Highest Scoring Words With Friends™ Play In The Letters babysitters
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Seven Letter Word Alert: (38 words)
artiest, artists, attires, babiest, babysit, baiters, barbies, barites, basters, batters, battery, battier, betrays, bitrate, bitsets, bitters, braises, breasts, iratest, rabbets, rabbits, ratbite, rebaits, satiety, satires, sitters, stabber, staters, stayers, straits, striate, tabbies, tasters, tastier, terabit, tsarist, yabbers, yttrias