The word brainstorming 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: 23
Highest Scoring Words With Friends™ Play In The Letters brainstorming
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Seven Letter Word Alert: (77 words)
agonism, agonist, airborn, airings, amnions, amongst, animist, anoints, arising, atoning, baiting, barring, basting, bastion, biasing, bigrams, biotins, bitings, boating, borings, brogans, gambits, gastrin, gnomist, iambist, ignitor, ingrain, introns, ironing, ironman, isogram, magnons, mansion, margins, marring, martini, martins, matings, matrons, migrant, minions, minting, misting, moaning, moating, morning, mortars, nations, nonarts, obtains, orating, origami, origins, raining, raising, ranting, ratings, rations, ringman, rinsing, rioting, roaming, roaning, roaring, signora, smiting, snaring, snoring, soaring, sorting, staring, stoning, storing, tarring, timings, tombing, trigram