The word nucleating 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: 19
Highest Scoring Words With Friends™ Play In The Letters nucleating
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Seven Letter Word Alert: (24 words)
ancient, angelic, annulet, antigen, canting, catenin, cauline, cingula, cutline, elating, eluting, gelatin, genital, gentian, guanine, lancing, leaning, lunatic, tagline, tailgun, unagile, unalign, unclean, uncling