The word derivational 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: 19
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (74 words)
adrenal, aeolian, aileron, airdate, airline, aneroid, anilide, anviled, availed, aviated, aviator, avoider, delator, deliria, denarii, detrain, deviant, dilater, dilator, diorite, diviner, drivein, edition, elation, ilvaite, inditer, inertia, invader, invalid, invited, inviter, invitro, latrine, leotard, lintier, livider, nitride, olivine, ordinal, otarine, ovarian, overlit, radiant, radiate, ratline, ravioli, reavail, reliant, retinal, retinol, rivaled, talonid, tendril, tiaraed, toenail, tradein, trailed, trained, travail, trenail, trivial, valiant, vanload, variant, variate, variola, vedanta, velaria, ventral, veranda, violate, violent, vitrine, vitriol