The word cashiering 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™ Play In The Letters
Seven Letter Word Alert: (38 words)
airings, arching, arcsine, arising, arsenic, arshine, carnies, cashier, cashing, ceasing, chagrin, chainer, changer, changes, charges, chasing, cringes, erasing, gainers, garnish, gnasher, hangers, hearing, hernias, inchers, inreach, irenics, raising, ranches, rechain, regains, rehangs, reicing, scaring, searing, sericin, sharing, shinier