The word disinvestments 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
Seven Letter Word Alert: (62 words)
deities, dements, demises, demists, densest, dentine, dentins, dentist, desists, destine, detents, detests, deveins, devests, devises, dieties, dietine, dietist, dimness, dismiss, dissent, ditties, divests, divines, eminent, emitted, endives, evident, indents, indites, insides, insists, intends, intense, intents, invents, invests, invited, invitee, invites, itemise, itemset, mindset, misedit, mitiest, mittens, nemesis, seitens, sestets, sestine, siemens, smitten, snidest, stented, stimied, stimies, stinted, tensest, tidiest, tiniest, tsetses, visited