The word hematolysis 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 hematolysis
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Seven Letter Word Alert: (42 words)
aimless, ashiest, atheism, atomise, halites, hamlets, hastily, hatless, holiest, homiest, hostels, hostile, hyalite, isohels, isohyet, isolate, laytime, loathes, lysates, maltose, meatily, messiah, messily, methyls, mislays, misseat, mitoses, moistly, molests, motleys, seamost, smileys, somites, stomies, stylise, stylish, stymies, systole, theisms, toyless, tyloses, tylosis