The word leukopenias 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: 21
Highest Scoring Words With Friends™ Play In The Letters leukopenias
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Seven Letter Word Alert: (37 words)
alkenes, alpeens, alpines, apelike, eelskin, elusion, enolase, epsilon, eupneas, eupnoea, inulase, kaoline, kaolins, kelpies, lineups, linkups, lupines, opaline, penlike, peonies, pleions, ploukie, puslike, sealion, sonlike, spaniel, spelean, spelunk, spinule, sunlike, unalike, unipole, unlikes, unspeak, unspoke, uplinks, upsilon