The word platitudinize 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: 29
Highest Scoring Words With Friends™ Plays In The Letters platitudinize
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Seven Letter Word Alert: (30 words)
anilide, attuned, diazine, diluent, diptail, dualize, initial, lunated, nuptial, painted, patient, patined, pentail, petunia, piazine, pintail, plaited, planted, plaudit, puttied, tailpin, tainted, taunted, undealt, unideal, unitize, untaped, untiled, utilize, zipline