The word sporangium 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 sporangium
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Seven Letter Word Alert: (27 words)
agonism, airguns, amusing, impugns, isogram, margins, mousing, parings, parsing, pausing, pouring, pursing, rasping, roaming, romping, rousing, rumping, signora, soaping, soaring, souping, souring, sparing, sporing, spuming, ungrasp, unpairs