The word steelmaker 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: 18
Highest Scoring Words With Friends™ Play In The Letters steelmaker
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Seven Letter Word Alert: (30 words)
armlets, elaters, kestrel, leakers, markets, meekest, meerkat, meeters, melters, realest, relates, release, remakes, remates, remeets, remelts, resmelt, restake, retakes, reteams, skelter, sleeker, smelter, stalker, stealer, steamer, talkees, talkers, teemers, tramels