The word argentites 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: (81 words)
aeriest, aigrets, antsier, arenite, argents, artiest, attires, earnest, eastern, enrages, entreat, entries, erasing, gainers, gaiters, garnets, gastrin, gearset, gestate, granite, grantee, greaten, greisen, ingrate, instate, integer, iratest, iterate, nastier, natters, nattier, nearest, neatest, negates, netters, nitrate, ratings, ratting, reagent, regains, regents, restage, restain, restate, resting, retains, retaste, retinas, retints, searing, seating, seriate, setting, stagier, stainer, staring, stating, sterane, stinger, straint, strange, striate, tangier, targets, tastier, tasting, tearing, teasing, tentage, tenters, tentier, ternate, testier, testing, tinters, trainee, transit, treeing, triaene, triages, trienes