The word fieldstones 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™ Plays In The Letters
Seven Letter Word Alert: (67 words)
defiles, defines, delints, delists, denoise, denotes, densest, dentils, desilts, destine, diesels, dissent, dotless, eloined, endless, enfolds, enlists, feedlot, felines, felsite, fileted, finesse, finless, fitness, flensed, flenses, flossed, foisted, fondest, fondles, indoles, infests, infolds, insoles, lefties, lenited, lenites, lesions, linseed, lioness, lionets, listens, nestled, nestles, netless, nosiest, oilseed, oldness, olefins, oneself, osselet, seitens, selfies, sestine, silents, snidest, softens, softies, stenose, stifled, stifles, tenfold, tensile, tieless, tinsels, toeless, tonsils