The word hematologists 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: 21
Highest Scoring Words With Friends™ Play In The Letters hematologists
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Seven Letter Word Alert: (95 words)
aiglets, aimless, alights, altoist, ashiest, atheism, atheist, atomise, egoisms, egoists, egotism, egotist, elogist, galoots, gamiest, gasohol, geishas, gelatos, geostat, gestalt, ghettos, gliomas, glioses, glottis, goalies, goatish, gooiest, goosies, goosish, gothism, gothite, haglets, halites, hamlets, hatless, hoagies, hogties, holiest, homages, homiest, hostels, hostile, imagoes, isohels, isolate, latites, ligases, ligates, loathes, loosest, maltose, megahit, messiah, misseat, mitoses, molests, moolahs, mottles, mottoes, oolites, ooliths, osteoma, otolite, otolith, sagiest, seahogs, seamost, semilog, shmoose, sigmate, sleighs, sleight, slights, smooths, soloist, somites, soothes, stalest, statism, stealth, stigmas, stogies, stomate, stomies, stooges, stoolie, taoists, theisms, theists, thistle, toilets, tomatos, toolset, tootles, tootsie