The word trapezohedra 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: 27
Highest Scoring Words With Friends™ Play In The Letters trapezohedra
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Seven Letter Word Alert: (36 words)
adapter, adaptor, adepter, adherer, adopter, aerated, aerator, eardrop, earthed, hardtop, hearted, hetaera, hoarder, operate, parader, pothead, praetor, predate, preheat, prorate, razored, readapt, readopt, redrape, redtape, reheard, reraped, retaped, retrade, retread, tapered, taperer, trapeze, treader, zapateo, zeroeth