The word astonishingly 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: 22
Highest Scoring Words With Friends™ Play In The Letters astonishingly
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Seven Letter Word Alert: (73 words)
agility, agonist, aisling, alights, anglist, anoints, antlion, atoning, ghastly, ghostly, gliosis, goatish, hailing, halting, hastily, hinting, hissing, hosting, insight, intagli, lashing, lasting, lathing, liaison, lignins, linings, listing, loaning, longish, losings, nailing, nastily, nations, nightly, ninthly, noisily, nothing, oligist, sailing, saintly, salting, sashing, sayings, shingly, shinily, shining, sightly, signals, silting, slating, slaying, slights, slogans, soiling, stagily, stanols, staying, stonily, stoning, stonish, stygian, styling, stylion, stylish, syntans, tailing, tilings, tinnily, toiling, tonsils, tossing, tylosis, yoginis