The word amphitheatric 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: 26
Highest Scoring Words With Friends™ Plays In The Letters amphitheatric
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Seven Letter Word Alert: (36 words)
airtime, apatite, aptamer, apteria, attache, campier, cattier, chapter, chatter, chimera, citrate, empiric, haircap, hatchet, hepatic, hitcher, imitate, impeach, itchier, matcher, picrate, picrite, pitcher, pithier, primate, ratchet, rematch, repatch, repitch, teacart, thearch, thermic, thither, tipcart, titmice, trachea