The word hereditament 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: 19
Highest Scoring Words With Friends™ Play In The Letters hereditament
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Seven Letter Word Alert: (62 words)
amender, arenite, attired, demerit, dentate, detente, detrain, diether, dimeter, earthed, earthen, emender, emirate, emitted, emitter, entered, entreat, hairnet, handier, headier, headmen, hearted, hearten, iterate, matinee, meander, meatier, mediate, merited, metered, methane, minaret, mitered, nattier, needier, neither, nitrate, raiment, readmit, reamend, remated, remined, renamed, retimed, tainted, teatime, teenier, teethed, teether, tentier, termite, ternate, theater, theatre, thereat, therein, tradein, trained, trainee, treated, triaene, trident