The word nonhierarchic 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: 25
Highest Scoring Words With Friends™ Plays In The Letters nonhierarchic
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Seven Letter Word Alert: (23 words)
anionic, cannier, canonic, carrion, chainer, chancre, charier, choicer, chronic, cocaine, cochair, concern, cornice, cornier, enchain, hairier, hoarier, hornier, inreach, oceanic, rainier, rancher, rechain