The word anorthites 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: (60 words)
another, anthers, antsier, arshine, artiest, atheist, atoners, attires, earshot, hairnet, hastier, hatters, hernias, heroins, histone, hitters, hornets, inshore, instate, intorts, iratest, nastier, natters, nattier, nitrate, norites, orients, otarine, rations, rattish, rattons, restain, retains, retinas, retints, retoast, rotates, senator, shatter, shorten, snotter, stainer, station, stonier, straint, striate, tarnish, tartish, tastier, thiones, thorite, threats, throats, thrones, tinters, tithers, toaster, transit, treason, triones