The word senatorial 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: 12
Highest Scoring Words With Friends™ Plays In The Letters senatorial
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Seven Letter Word Alert: (61 words)
aeolian, aerials, aileron, antlers, antsier, areolas, arsenal, artisan, atoners, atonias, atresia, elastin, elation, entails, estriol, isolate, lariats, latrine, leantos, lionets, loaners, loiters, nailers, nailset, nastier, norites, nostril, orients, orleans, otarine, rations, ratline, realist, reliant, reloans, renails, rentals, reslant, restain, retails, retains, retinal, retinas, retinol, salient, saltern, saltier, sealant, sealion, senator, slatier, stainer, sternal, stonier, tailors, toenail, toilers, treason, trenail, triones, tsarina