The word debutantes 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™ Plays In The Letters
Seven Letter Word Alert: (29 words)
abetted, abutted, attends, attuned, attunes, battens, butanes, butenes, debates, dentate, detents, detubes, detunes, enbused, estuate, neatest, nutseed, sauteed, standee, statued, stented, student, stunted, subtend, taunted, tautens, testbed, tetanus, unsated