The word admissible 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: 18
Highest Scoring Words With Friends™ Plays In The Letters admissible
:
Seven Letter Word Alert: (23 words)
abseils, aidless, aimless, alibies, bedlams, beldams, biassed, blissed, dailies, daisies, damsels, delimbs, disable, dismals, liaised, liaises, misdeal, misdial, mislaid, mislead, missaid, missile, similes