The word straightedge 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: 19
Highest Scoring Words With Friends™ Plays In The Letters straightedge
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Seven Letter Word Alert: (97 words)
adheres, aeriest, aigrets, aridest, artiest, astride, atheise, atheist, attired, attires, daggers, dearest, dearies, dearths, diester, dieters, diether, diggers, dishrag, disrate, dithers, earthed, edgiest, egghead, eggiest, eighter, gadgets, gaiters, gathers, gearset, gestate, greased, gritted, hagride, hagseed, hardest, hastier, hatreds, hatters, headers, headier, headset, hearsed, hearted, heaters, hedgers, heisted, hitters, iratest, iterate, rattish, readies, reasted, redates, reedits, reheats, rehides, resight, restage, restate, retaste, righted, saggier, sedater, sedgier, seriate, shadier, shagged, shatter, sheared, shirted, sighted, sighter, stagger, stagier, started, striate, taggees, taggers, taggier, targets, tartish, tasered, tastier, testier, tethers, theater, theatre, thereat, threads, threats, tighter, tirades, tithers, trashed, treated, triages