The word patriarchies 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™ Play In The Letters patriarchies
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Seven Letter Word Alert: (96 words)
acaters, achiest, airiest, airship, aitches, aphasic, apteria, archers, artsier, aseptic, aspirer, atresia, carpers, carpets, carries, carters, cashier, catarrh, chapter, charier, charter, chaster, chipset, chirper, ciphers, cithers, crasher, craters, crisper, cristae, eparchs, erratic, haircap, hairier, hapters, haptics, harpers, harpies, harpist, hastier, hepatic, icespar, irisate, itchier, pachisi, parches, pariahs, parties, pastier, patches, phraser, piarist, picrate, picrite, pirates, pitcher, pitches, pithier, pitiers, prairie, praiser, praters, precast, pricers, pricier, raciest, raspier, ratrace, rechart, repairs, repatch, repitch, restrap, retraps, richest, satiric, scarier, scraper, sharper, sharpie, spacier, spectra, spheric, spicate, spicier, spiraea, striper, tarries, tephras, tipsier, tracers, trachea, traipse, trasher, triarch, triceps