The word partnering 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: 17
Highest Scoring Words With Friends™ Play In The Letters partnering
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Seven Letter Word Alert: (35 words)
angrier, antigen, earning, earring, entrain, gentian, grainer, granite, granter, grinner, ingrate, nearing, painter, panting, parting, partner, pertain, pinnate, prating, printer, rangier, ranting, reaping, rearing, regnant, regrant, renting, repaint, reprint, retrain, tangier, tarring, tearing, terrain, trainer