The word steroidal 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: 11
Highest Scoring Words With Friends™ Play In The Letters steroidal
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Seven Letter Word Alert: (36 words)
aridest, astride, astroid, delator, derails, details, dialers, dilater, dilates, dilator, disrate, editors, estriol, isolate, leotard, loaders, loiters, ordeals, realist, redials, reloads, retails, roadies, roasted, roisted, saltier, slatier, soldier, sortied, steroid, storied, tailors, tierods, tirades, toilers, trailed