The word pneumatics 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: 21
Highest Scoring Words With Friends™ Play In The Letters pneumatics
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Seven Letter Word Alert: (42 words)
acumens, amnesic, aseptic, aunties, auspice, caesium, catnips, cinemas, cuspate, encamps, icemans, impacts, impetus, inmates, inscape, inspect, minuets, minutes, mistune, munites, naptime, nematic, nutcase, panties, pastime, patines, peanuts, pectins, pemican, petunia, picante, pumices, puniest, putamen, sanctum, sinuate, spicate, teacups, tsunami, uncapes, unmates, uptimes