The word feudalizing 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: 29
Highest Scoring Words With Friends™ Play In The Letters feudalizing
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Seven Letter Word Alert: (28 words)
aligned, anilide, dealign, dealing, dialing, diazine, dualize, dueling, eliding, eluding, failing, feazing, feuding, finagle, flanged, fueling, gainful, indulge, infidel, infield, languid, lauding, leading, leafing, unagile, unfazed, unideal, unified