The word classifiable 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: 23
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (23 words)
abscise, abseils, aliases, alibies, bacilli, befalls, facials, faecals, fascial, fascias, felsics, fillies, fissile, iceball, icefall, labials, laicise, liaises, salable, scabies, scillas, silicas, silicle