The word basidiospores 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: 20
Highest Scoring Words With Friends™ Play In The Letters basidiospores
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Seven Letter Word Alert: (57 words)
abiders, abioses, abiosis, adipose, adsorbs, airbeds, airside, asepsis, aspired, aspires, bedrops, biassed, biasses, birdies, bossier, braised, braises, brassed, brasses, dairies, daisies, despair, diapers, diaries, disbars, dispose, disrobe, dossier, ebriids, iodiser, iodises, isobars, isopods, opioids, paresis, passers, periods, pisoids, pissier, poroses, porosis, praised, praises, riboses, roadies, sassier, seabird, sidebar, sissier, soapers, soapier, spaders, spiders, spireas, spiroid, spoored, spreads