The word defeminising 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: 23
Highest Scoring Words With Friends™ Play In The Letters defeminising
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Seven Letter Word Alert: (25 words)
deeming, defines, deifies, diimine, dingies, edifies, endings, engined, engines, feeding, feesing, feigned, fending, finding, finings, imidine, mending, minding, misfeed, needing, seeding, seeming, sending, smidgen, smidgin