The word trapezohedron 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: 29
Highest Scoring Words With Friends™ Play In The Letters trapezohedron
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Seven Letter Word Alert: (71 words)
adepter, adherer, adopter, adorner, another, dozenth, eardrop, earthed, earthen, hardtop, harpoon, hearted, hearten, heptane, hoarder, honored, honoree, honorer, norther, notepad, odorant, operand, operant, operate, optrode, ornater, ozonate, panther, partner, pentode, phenate, photoed, portend, pothead, potheen, praetor, predate, preheat, prenote, pretend, pronate, prorate, protean, razored, readopt, readorn, redrape, redroot, redtape, reheard, rehoned, rehonor, reraped, retaped, retrade, retread, rezoned, tapered, taperer, terrane, thereon, thorned, throned, tornado, torpedo, trapeze, treader, trooped, trooper, zeroeth, zonated