The word amenabilities 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™ Play In The Letters amenabilities
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Seven Letter Word Alert: (71 words)
ablates, abstain, ailment, albites, alibies, aliment, ambiant, ambient, amentia, amiable, amnesia, animals, animate, animist, astilbe, baleens, baseman, basemen, batsman, batsmen, beamlet, beanies, beslime, bestman, betimes, bimetal, eatable, elastin, elitism, emanate, enables, enamels, entails, iambist, ileitis, initial, inmates, itemise, labiate, lambast, laments, laminae, laminas, lateens, leanest, lenites, lesbian, libates, lineate, malaise, maleate, manatee, mantels, mantles, matinee, meanest, meanies, militia, miniate, nabales, nailset, netmail, salient, sealant, seminal, stamina, tamable, tamales, tenable, tensile, timbale