The word apartments 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 apartments
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Seven Letter Word Alert: (31 words)
anapest, aptamer, artsman, artsmen, entraps, mantrap, mantras, martens, matters, natters, panters, parents, patents, pattern, patters, peasant, pretans, rampant, restamp, smarten, smatter, spartan, spatter, stamper, tampers, tapeman, tapster, tarpans, tartans, tartpan, trepans