The word investitures 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: 18
Highest Scoring Words With Friends™ Play In The Letters investitures
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Seven Letter Word Alert: (75 words)
ensuite, ensures, entries, entrust, enviers, inserts, insures, intrust, intuits, inverse, inverts, invests, invitee, inviter, invites, nesters, netters, neuters, nitrite, nittier, nutsier, nutters, nuttier, reissue, renests, resents, restive, retests, retints, retunes, reunite, revises, revisit, revuist, seitens, sestine, setters, sievert, sinters, sitters, stivers, stivier, streets, striven, strives, stunter, suiters, sunrise, tensest, tenters, tentier, tenures, tersest, testers, testier, tiniest, tinters, tintier, trienes, trivets, trustee, uniters, unities, unreset, unrests, unrivet, uterine, uveitis, veinier, venture, verists, versine, virtues, viruses, vitrine