The word thiouracils 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: 18
Highest Scoring Words With Friends™ Play In The Letters thiouracils
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Seven Letter Word Alert: (33 words)
acutish, authors, cashout, chariot, chorals, colitis, coltish, crustal, cuatros, cultish, curials, curtail, haircut, haricot, harlots, ischial, italics, loutish, oculars, oculist, oscular, ostrich, outsail, rhotics, rituals, rosalic, satiric, scholar, scrotal, solicit, stoical, tailors, urolith