The word captivatingly 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
Seven Letter Word Alert: (39 words)
agility, alginic, alicant, anaptic, aplitic, aviatic, calving, capital, captain, cattail, cattily, catting, claypan, glyptic, intagli, lacinia, nattily, patting, pigtail, pintail, pitting, pitying, placing, plating, playact, playing, pliancy, ptyalin, tacitly, tailing, tailpin, tilapia, tilting, titanic, typical, vaginal, valiant, vatting, vialing