The word concentrical is playable in Words With Friends™, but 1 blank substituting for the letter 'c' is 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™ Plays In The Letters concentrical
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Seven Letter Word Alert: (56 words)
aconite, aileron, aloetic, ancient, antlion, article, cacolet, calcine, calcite, caloric, calorie, cannier, cannoli, canonic, catenin, central, centric, certain, circlet, clarion, coalier, coalite, cocaine, coeliac, conceal, conceit, concern, concert, conical, connect, contain, corneal, cornice, elation, enactor, entrain, erotica, intoner, laconic, lactone, lantern, latrine, lection, nonlate, nonliar, nonreal, oceanic, onliner, otarine, ratline, recital, reliant, retinal, retinol, toenail, trenail