The word catastrophic 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™ Play In The Letters catastrophic
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Seven Letter Word Alert: (45 words)
aphasic, apricot, archaic, arctics, atropia, captcha, captors, carhops, chaotic, chariot, citator, coarcts, cochair, haircap, haptics, haricot, harpist, isopach, octarch, ostrich, pariahs, patriot, practic, prosaic, protist, rattish, rhotics, ricotta, scoriac, scratch, shitpot, tactics, tapioca, tartish, throats, tictacs, tictocs, tipcart, tipcats, toccata, toparch, tricots, trophic, tropics, tropist