The word unmechanical 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: 27
Highest Scoring Words With Friends™ Plays In The Letters unmechanical
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Seven Letter Word Alert: (27 words)
acclaim, acicula, alanine, alumina, alumnae, anaemic, cacemia, calcine, calcium, caliche, cannula, canulae, cauline, chalice, chancel, channel, enchain, inhuman, lacunae, laminae, lineman, machine, manacle, melanin, nucleic, unchain, unclean