The word cherrystones 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: 20
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (89 words)
cenotes, censers, censors, centers, centres, coherer, coheres, corners, cornets, corsets, coyness, cresset, crosser, echoers, encores, encysts, enocyte, erector, escorts, estrone, etchers, ethynes, eyeshot, heteros, honesty, hornets, hotness, necrose, neocyte, nesters, norther, notcher, notches, octenes, octynes, oysters, rechose, recross, rectors, rectory, reentry, rehones, renests, renters, rerents, rescore, resects, resents, reshoes, reshore, resorts, resters, restore, retches, rhetors, rosters, scenery, scenter, scorers, scorner, screens, screeny, scryers, scyther, scythes, secerns, secrets, sectors, sensory, shorten, shorter, shyster, snorers, snorter, sorcery, sorters, stenchy, stenose, stereos, sterner, stoners, storeys, styrene, tensors, thereon, thrones, torches, trochee, yestern