The word pigmentation 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 pigmentation
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Seven Letter Word Alert: (46 words)
antigen, atoning, emoting, gentian, imagine, imitate, impinge, magneto, matting, meaning, megaton, mention, miniate, mintage, minting, mitogen, moaning, moating, montage, montane, naptime, netting, nongame, nonmate, nonmeat, opening, opining, paining, panting, patient, patting, petting, pigment, pimento, pinnate, pitting, pontine, pottage, potting, tamping, tangent, teaming, tenting, timpani, tinting, tonnage