The word investigations 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: 22
Highest Scoring Words With Friends™ Play In The Letters investigations
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Seven Letter Word Alert: (84 words)
agonies, agonise, agonist, anoints, antigen, asinine, atoning, egoists, egotist, ensigns, evasion, eviting, gavotte, gentian, geostat, ignites, ingests, inosine, inosite, instant, instate, intents, intones, invents, invests, invites, ionises, naivest, nations, natives, nesting, netting, noseans, nosiest, notists, onstage, sagiest, savings, seating, seitans, sensing, sestina, setting, siennas, sieving, signets, sitting, sonnets, stating, statins, station, stative, staving, stetson, stiving, stogies, stoning, tangent, tannest, taoists, tasting, teasing, tenants, tensing, tension, tenting, testing, tiniest, tinting, tonnage, tossing, vainest, vastest, vatting, veining, venison, venting, vesting, vetoing, vetting, vintage, visages, visions, vitiate