The word haberdashers 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™ Play In The Letters haberdashers
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Seven Letter Word Alert: (46 words)
abasers, abashed, abashes, abrader, abrades, abrased, abraser, abrases, adherer, adheres, barreed, bashers, bearers, bedares, bedress, beheads, brasher, brassed, dashers, deashes, debaser, debases, dresser, erasers, harsher, headers, hearers, hearsed, hearses, herders, herdess, rashers, readers, rebased, rebases, redress, reheard, rehears, rereads, reshare, sabered, seabeds, shaders, sharers, sheared, shearer