The word vinegariness 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: 20
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (64 words)
airings, arising, asinine, avenger, avenges, earning, engines, engrave, enrages, ensears, ensigns, ensnare, enviers, erasing, evening, gainers, gassier, genesis, gravies, greases, greisen, grieves, ingrain, ingress, insaner, inverse, nearing, nerving, raining, raising, raisins, ravines, ravings, reaving, reeving, regains, regives, reining, resaves, resigns, revises, rinsing, risings, savings, searing, sensing, serving, siennas, sieving, signees, signers, singers, sinners, snaring, sringas, vearing, veering, veinier, veining, versine, versing, vinegar, virgins, visages