The word dolphinfishes 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 dolphinfishes
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Seven Letter Word Alert: (61 words)
delphis, despoil, dipoles, dispels, dispose, doilies, dolphin, elision, enfolds, epsilon, finless, fissile, fission, flossed, fondles, hipness, hisself, idolise, indoles, infidel, infield, infolds, insides, insoles, iodines, iodises, ionised, ionises, iphones, isohels, isospin, lesions, lioness, lionise, oilfish, oldness, olefins, phenols, phished, phonies, pinfish, pinfold, pinhold, pinhole, pinless, pisoids, pleions, selfish, shields, sinoids, siphons, sloshed, soliped, spindle, spinels, spinode, spinose, spionid, splined, splines, spoiled