The word branchiopods 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: 25
Highest Scoring Words With Friends™ Plays In The Letters branchiopods
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Seven Letter Word Alert: (51 words)
abscind, abscond, adhorns, anchors, archons, barhops, boarish, boorish, bosonic, bradoon, bronchi, broncos, candors, carbons, carhops, chorion, choroid, condors, corands, cordoba, cordons, coronas, dishorn, dishpan, donairs, hadrons, hairdos, harpoon, inboard, indoors, inroads, isopach, nordics, onboard, orchids, ordains, orphans, pardons, phobiac, phobias, phobics, phonics, ponchos, prosaic, racoons, raphids, scabrid, scorpio, shinpad, soprano, spinach