The word bloodsucker 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™ Play In The Letters bloodsucker
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Seven Letter Word Alert: (53 words)
becloud, becurls, bedrock, bedsock, beducks, bescour, blocked, blocker, bloused, boleros, boodles, bookers, boulder, buckled, buckler, buckles, closure, colobus, colours, cookers, coolers, coursed, creosol, croodle, crooked, curdles, deblock, decolor, dockers, doubler, doubles, duckers, lockers, lookers, obduces, obscure, reblock, rebooks, recooks, redbuck, redocks, relocks, relooks, roebuck, rosebud, scolder, scoured, sculked, sculker, sourced, subcode, suckled, suckler