The word blacklisted 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: 24
Highest Scoring Words With Friends™ Plays In The Letters blacklisted
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Seven Letter Word Alert: (62 words)
albites, astilbe, backlit, baldest, ballets, batiked, batlike, bedtick, billets, blacked, blasted, blastic, cakiest, castile, castled, catlike, cedilla, cellist, citable, citadel, cladist, dacites, decabit, delicts, deltaic, deskill, details, deticks, dialect, dieback, dilates, disable, elastic, iceball, laciest, libated, libates, likable, saclike, setback, sickbed, sickled, skiable, skilled, skillet, slacked, slicked, stabled, stacked, stalked, stalled, sticked, stickle, stilled, tackled, tackles, talkies, tallied, tallies, tickled, tickles, tieback