The word nonhierarchical 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: 28
Highest Scoring Words With Friends™ Play In The Letters nonhierarchical
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Seven Letter Word Alert: (74 words)
achiral, acholia, aclinic, aeolian, aileron, airhole, airline, alanine, aniline, anionic, archaic, archeal, archean, areolar, calcine, caliche, caloric, calorie, cannier, cannoli, canonic, carinae, carinal, caroler, carrion, chainer, chalice, chancel, chancre, channel, charier, chlorin, choicer, choleic, cholera, choline, chorale, chronic, circler, clarion, cloacae, coalier, cocaine, cochair, cochlea, coeliac, colicin, conceal, concern, conical, corneal, cornice, cornier, cranial, enchain, hairier, hernial, hoarier, hornier, incline, inhaler, inreach, lacinia, laconic, nonliar, nonreal, oceanic, onliner, racecar, railcar, rainier, rancher, rechain, roilier