The word licentious 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 licentious
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Seven Letter Word Alert: (37 words)
clients, colitis, consult, counsel, cuisine, cutline, elicits, elision, elusion, elution, eosinic, iconist, incites, inosite, iolites, lection, lionets, lionise, lucites, luniest, notices, oculist, oiliest, outlies, outline, section, silicon, solicit, stencil, suction, unclose, unclots, uncoils, unities, unstoic, utensil, utilise