The word precipitator 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 precipitator
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Seven Letter Word Alert: (38 words)
airpipe, airport, apricot, attirer, carport, cattier, citator, citrate, crappie, creator, critter, cropper, ectopia, epicarp, erotica, erratic, patriot, picrate, picrite, praetor, prairie, precoat, priapic, pricier, prorate, protect, rapport, rattier, reactor, retract, ricotta, tipcart, tippier, tiptoer, tractor, traitor, trapper, tripper