The word frothiness 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: 16
Highest Scoring Words With Friends™ Play In The Letters frothiness
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Seven Letter Word Alert: (44 words)
fishers, fishnet, fitness, foister, forests, forints, forties, fosters, heroins, histone, hornets, hosiers, hotness, infests, inserts, inshore, norites, nosiest, orients, reshift, resifts, rosiest, seniors, sherifs, shifter, shiners, shorten, shrifts, shrines, sifters, sinters, snifter, softens, softies, sorties, stoners, stonier, stonish, stories, strifes, tensors, thiones, thrones, triones