The word unworkmanlike is playable in Words With Friends™, but 1 blank substituting for the letter 'k' is 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: 26
Highest Scoring Words With Friends™ Plays In The Letters unworkmanlike
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Seven Letter Word Alert: (50 words)
aileron, almoner, arenium, armlike, enamour, ironman, kaoline, knaurle, lankier, leukoma, lineman, linkman, loamier, manlier, manlike, melanin, mineral, moniker, moraine, neuroma, nominal, nonamer, nonlake, nonliar, nonmail, nonmale, nonmeal, nonmilk, nonreal, numeral, oaklike, oarlike, onliner, ramekin, reunion, romaine, ruminal, unalike, unlearn, unmaker, unmoral, urnlike, warlike, waulker, winkler, wireman, wonkier, workman, workmen, wrinkle