The word cuttlefishes 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: 22
Highest Scoring Words With Friends™ Play In The Letters cuttlefishes
:
Seven Letter Word Alert: (43 words)
celsius, chisels, cultish, cultist, cutlets, felsics, felsite, fescues, fetches, fetuses, filches, fistule, fleshes, flushes, flutist, helices, hessite, hisself, hueless, hustles, iceless, lefties, leftist, lettuce, leucite, lucites, lushest, lutists, lutites, scuttle, selects, selfies, selfish, settles, shuttle, sleuths, sluices, stifles, sulfite, techies, theists, thistle, tieless