The word architraves 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 architraves
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Seven Letter Word Alert: (49 words)
acaters, achiest, activer, actives, aitches, archers, archive, arrives, artsier, atresia, avarice, aviates, carries, carters, carvers, cashier, catarrh, caveats, charier, charter, chaster, cithers, crasher, craters, cravats, cravers, cristae, erratic, harvest, hastier, raciest, ratrace, rechart, richest, scarier, starver, striver, tarries, thriver, thrives, tracers, trachea, trasher, triarch, vacates, variate, varices, veritas, viscera