The word ventilatory 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™ Plays In The Letters ventilatory
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Seven Letter Word Alert: (35 words)
aileron, elation, inertly, inlayer, irately, latrine, layover, lottery, naively, naivety, nattier, nattily, nitrate, novelty, olivary, otarine, ovately, overlay, overlit, overtly, ovinely, ratline, reality, reliant, retinal, retinol, retotal, tearily, tertial, toenail, trenail, variety, ventral, violate, violent