The word unethically 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: 22
Highest Scoring Words With Friends™ Play In The Letters unethically
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Seven Letter Word Alert: (21 words)
acutely, alethic, anthill, cauline, chantey, chutney, cleanly, cutline, cyanite, ethical, helical, hellcat, hyaline, hyalite, latency, lithely, lunatic, nullity, unlatch, unteach, yachtie