The word stewardesses 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: 16
Highest Scoring Words With Friends™ Play In The Letters stewardesses
:
Seven Letter Word Alert: (36 words)
asserts, dearest, deserts, dessert, dewater, dresses, reasted, redates, reested, resawed, reseats, reseeds, resewed, seaters, seaweed, sedater, sedates, seeders, seesaws, steered, steward, strawed, strewed, sweated, sweater, sweeter, tarweed, tasered, teasers, tressed, tresses, wasters, watered, weeders, wrasses, wrested