The word neutropenia 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: 17
Highest Scoring Words With Friends™ Play In The Letters neutropenia
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Seven Letter Word Alert: (47 words)
arenite, entrain, epurate, etaerio, eupnoea, inepter, intoner, neonate, neutron, nitrene, operant, operate, otarine, outearn, painter, peatier, pentane, pertain, petunia, pinenut, pinnate, pioneer, pointer, pontine, poutier, poutine, prenote, pronate, protean, protein, punnier, puritan, rainout, reinput, repaint, repoint, reunion, reunite, routine, terpine, trainee, triaene, unearnt, uneaten, urinate, uterine, utopian