The word cholestasis 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
Seven Letter Word Alert: (59 words)
achiest, aitches, alecost, alethic, aloetic, ascites, ashiest, ashless, castile, castles, celosia, chaises, chalets, chaoses, chassis, chisels, cholate, clashes, classes, closest, closets, clothes, coalise, coalite, coltish, cosiest, elastic, ethical, halites, hassles, hatless, holiest, hostels, hostess, hostile, isohels, isolate, laciest, lactose, lassies, lassoes, latches, loathes, locates, oecists, ossicle, sachets, sacless, satchel, scathes, schists, siestas, slashes, sloshes, socials, solaces, stashes, stoical, tassels