The word patroness 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: 13
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (33 words)
aptness, atoners, entraps, operant, panters, parents, parsons, pasters, pastors, patrons, persona, persons, postern, posters, pretans, pronate, pronest, protean, reasons, repasts, reposts, resnaps, respans, respots, seaport, senator, soapers, sparest, stepson, stoners, tensors, treason, trepans