The word mudslingers 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: 20
Highest Scoring Words With Friends™ Plays In The Letters mudslingers
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Seven Letter Word Alert: (62 words)
designs, digress, dimness, drumlin, dueling, eluding, emulsin, gilders, girdles, girnels, gliders, gremlin, guilder, guldens, gumless, gunless, gussied, indulge, ingress, insured, insures, legumin, lingers, melding, messing, minders, mingled, mingler, mingles, minuses, misrule, misused, misuser, mueslis, mungers, musings, muslins, regilds, reminds, resigns, reusing, rimless, rulings, rumless, sidlers, signers, singers, singled, singles, sliders, slinger, sludges, smidgen, smilers, smudger, smudges, snudges, sudsier, sudsing, sunrise, surmise, undress