The word branchiopodans 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: 28
Highest Scoring Words With Friends™ Play In The Letters branchiopodans
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Seven Letter Word Alert: (79 words)
abandon, abraids, abscind, abscond, acrasid, adhorns, anapsid, anarchs, anchors, andiron, aphasic, aphonia, archons, ascarid, barhops, boarish, boorish, bosonic, brachia, bradoon, bronchi, broncos, canards, candors, carbons, carhops, chanson, chorion, choroid, condors, corands, cordoba, cordons, coronas, dharnas, dishorn, dishpan, donairs, hadrons, haircap, hairdos, handcar, hardpan, harpoon, inboard, indoors, innards, inroads, isopach, nanorod, nonacid, nondrip, nonpaid, nonpros, nordics, onboard, orchids, ordains, orphans, pardons, pariahs, phobiac, phobias, phobics, phonics, phonons, piranha, ponchos, prosaic, racoons, radians, raphids, sandbar, saponin, scabrid, scorpio, shinpad, soprano, spinach