The word cooperating 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: 20
Highest Scoring Words With Friends™ Play In The Letters cooperating
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Seven Letter Word Alert: (58 words)
aconite, apogeic, apricot, cantrip, caption, carping, carting, cartoon, catogen, certain, coating, cognate, coinage, cooping, coreign, coronet, crating, ectopia, egotrip, enactor, erotica, goopier, granite, ingrate, ironage, nepotic, octagon, operant, orating, oration, oregano, organic, otarine, painter, parting, pertain, picante, picrate, pointer, porcine, porotic, portage, portico, porting, portion, prating, precoat, pronate, prootic, protean, protein, reaping, repaint, repoint, rooting, tangier, tearing, tracing