The word paddlefishes 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: 23
Highest Scoring Words With Friends™ Play In The Letters paddlefishes
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Seven Letter Word Alert: (59 words)
aediles, aidless, deadish, deashed, deashes, deepish, defiled, defiles, defleas, deflesh, deleads, delphis, depside, deshade, despise, diesels, disease, dispels, elapsed, elapses, faddish, fiddles, fielded, flashed, flashes, fleshed, fleshes, halides, hapless, healded, helipad, hisself, laddies, leashed, leashes, lipases, paddies, paddles, palsied, palsies, pedaled, peddles, piddles, pieless, plaided, plashed, plashes, pleaded, pleased, pleases, saddles, sealife, seaside, selfies, selfish, sepaled, sheafed, shields, slashed