The word wealthiness 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™ Plays In The Letters
Seven Letter Word Alert: (48 words)
ashiest, atheise, aweless, easiest, elastin, enlists, enseals, entails, ethanes, halites, hastens, hatless, hessite, inhales, lateens, leanest, leashes, lenites, lineate, listens, nailset, nestles, netless, salient, salines, sateens, seitans, seitens, senates, sensate, sestina, sestine, silanes, silents, swathes, tealess, teasels, tensile, tieless, tinsels, weasels, wetness, wheaten, whistle, whitens, winless, witless, witness