The word rhodochrosites 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: 22
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (86 words)
ceroids, cherish, chooser, chooses, choroid, cithers, coedits, coheirs, cohorts, cooties, corrode, corsets, cosiest, credits, crosier, crossed, crosser, dehorts, directs, disroot, dissect, ditcher, ditches, dithers, doctors, dossier, editors, erotics, escorts, heroics, hitched, hitcher, hitches, hoisted, horsier, hosiers, hotrods, oecists, orchids, osteoid, ostrich, records, recross, rectors, redroot, reroots, reshoot, resorts, restirs, rhetors, rhotics, richest, rioters, roisted, roister, roosted, rooster, rooters, rosiest, rosters, scooted, scooter, scorers, sectors, shirted, shooter, shorted, shorter, soothed, soother, soothes, sootier, sorters, sortied, sorties, steroid, stirred, storied, stories, strider, strides, stridor, tierods, torched, torches, toroids