The word chromospheres 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™ Plays In The Letters chromospheres
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Seven Letter Word Alert: (47 words)
cephems, chomper, chooser, chooses, chromes, coherer, coheres, compere, compose, corpses, crosser, echoers, emperor, empress, mercers, meshers, moocher, mooches, oosperm, percher, perches, pooches, porches, poroses, presser, process, rechose, recross, rehomes, remorse, reperch, reposer, reposes, repress, rescope, rescore, reshoes, reshore, resorps, rompers, roomers, schemer, schemes, scooper, scorers, shmoose, spheres