The word dentifrices 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: 19
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (81 words)
centers, centred, centres, cinders, cistern, citrine, credits, crested, cretins, deceits, decries, defects, deficit, defiers, definer, defines, deicers, deifier, deifies, deistic, deities, deniers, descent, destine, diciest, diester, dieters, dietics, dieties, dietine, directs, dirties, discern, ditsier, edifice, edifier, edifies, eidetic, enteric, enticed, enticer, entices, entries, fencers, fenders, finders, friends, incised, incited, inciter, incites, indices, indicts, inditer, indites, infects, insider, irenics, niftier, nitride, recited, recites, reedits, refects, refinds, refined, refines, reified, reifies, rescind, scented, scenter, sericin, sincere, snifter, sterned, tenders, tidiers, tinders, trienes, trifids