The word macrosporangia 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: 26
Highest Scoring Words With Friends™ Play In The Letters macrosporangia
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Seven Letter Word Alert: (74 words)
acapnia, agarans, agarics, agnosia, agnosic, agonism, airgaps, anagram, angioma, apogaic, arraign, camping, campion, cariama, carping, carrion, comings, cooping, copings, copsing, coronas, corpora, corsair, crampon, crimson, isogram, maniacs, maracas, marasca, marconi, margins, marinas, maroons, marring, mascara, masonic, microns, mooring, moorpan, moronic, narcoma, oarsman, omicron, organic, paangas, paragon, parings, parsing, poromas, program, prosaic, prosoma, racoons, rancors, rasping, roaming, roaring, romping, rooming, sangoma, sangria, sarcoma, sariama, scaring, scoping, scoring, scorpio, signora, soaping, soaring, soprano, spacing, sparing, sporing