The word vinegarweed 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 vinegarweed
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Seven Letter Word Alert: (42 words)
angered, avenged, avenger, deaving, deraign, derange, diverge, drawing, dwarven, engrave, enraged, evading, grained, greened, grenade, grieved, invader, inweave, needier, ragweed, reading, reaving, reeving, reigned, reneged, renewed, revenge, reweave, vearing, veering, vinegar, wagered, warding, wavered, wearied, wearing, weaving, wedgier, weedier, weeding, weenier, widener