The word phalacrosis 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: 20
Highest Scoring Words With Friends™ Play In The Letters phalacrosis
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Seven Letter Word Alert: (28 words)
achiral, acholia, aphasic, caliphs, carhops, carpals, casspir, chorals, haircap, isopach, parasol, pariahs, pascals, phrasal, polaric, prosaic, rascals, raspish, rosalic, sacrals, sailors, scalars, scholar, schorls, scorias, socials, spacial, spirals