The word superstructures 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: 24
Highest Scoring Words With Friends™ Play In The Letters superstructures
:
Seven Letter Word Alert: (62 words)
cresses, cresset, curette, cursers, cussers, cutters, percuss, peruses, pesters, precuts, presets, presser, presses, pretest, pursers, pursuer, pursues, putters, recures, recurse, recuses, repress, rescuer, rescues, resects, respect, resteps, resters, retests, reutter, rupture, russets, scepter, sceptre, secrets, securer, secures, septets, sestets, setters, specter, spectre, sprucer, spruces, spurrer, spurter, sputter, streets, stupers, suspect, sutures, tersest, testers, tresses, trusses, trustee, truster, tsetses, turrets, ureters, usurper, utterer