The word sanctitude 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: 16
Highest Scoring Words With Friends™ Play In The Letters sanctitude
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Seven Letter Word Alert: (42 words)
acutest, attends, attuned, attunes, aunties, candies, dacites, decants, dentist, descant, destain, detains, dictate, discant, distant, ductase, dunites, incased, induces, inducts, instate, instead, nictate, nutcase, sainted, scatted, sinuate, situate, stained, statice, statued, stinted, student, stunted, tainted, taunted, tautens, tetanic, tetanus, uncased, uncited, unsated