The word trunkfishes 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: 22
Highest Scoring Words With Friends™ Plays In The Letters trunkfishes
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Seven Letter Word Alert: (51 words)
fishers, fishnet, fissure, fitness, funkers, funkier, furnish, fussier, hirsute, hunkers, hunkier, hunters, huskers, huskier, huskies, infests, infuser, infuses, inserts, insures, nutsier, reknits, reshift, resifts, rethink, sherifs, shifter, shiners, shrieks, shrifts, shrikes, shrines, shrinks, shunter, shutins, sifters, sinkers, sinters, snifter, stinker, strifes, strikes, suiters, sunfish, sunrise, surfeit, thinker, tinkers, tuskers, uniters, unrests