The word inhospitably 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: 24
Highest Scoring Words With Friends™ Plays In The Letters inhospitably
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Seven Letter Word Alert: (34 words)
ability, abolish, absinth, albinos, apishly, bastion, biolith, biotins, bypaths, hastily, hatpins, hobnail, inhabit, liaison, nastily, noisily, notably, obtains, phobias, phonily, pianist, pinitol, pintail, pithily, ptyalin, pythons, saintly, shinily, soapily, stonily, stylion, tailpin, tipsily, topsail