The word insecurities 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: 17
Highest Scoring Words With Friends™ Play In The Letters insecurities
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Seven Letter Word Alert: (61 words)
censers, censure, centers, centres, cerises, cistern, citrine, cresset, cretins, cruises, cuisine, encrust, ensuite, ensures, enteric, enticer, entices, entries, iciness, incests, incises, inciter, incites, incrust, insects, inserts, insures, irenics, nesters, neuters, nutsier, recites, recuses, reissue, renests, rescues, resects, resents, retunes, reunite, rustics, scenter, screens, secerns, secrets, secures, seitens, sericin, sestine, sincere, sinters, suiters, sunrise, tenures, trienes, unerect, uniters, unities, unreset, unrests, uterine