The word misalliances 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: 21
Highest Scoring Words With Friends™ Plays In The Letters misalliances
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Seven Letter Word Alert: (42 words)
aclinal, aimless, aliases, amnesia, amnesic, anaemic, animals, caseins, cinemas, encalms, icemans, icemass, iciness, illness, incises, inseams, lacinia, laicise, laminae, laminal, laminas, liaises, malaise, malices, manacle, maniacs, manilla, manless, menisci, micella, miscall, missile, salamis, salines, scillas, seismic, seminal, silanes, silicas, silicle, simians, similes