The word administrators 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 administrators
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Seven Letter Word Alert: (80 words)
airmass, airraid, amritas, animist, artisan, artists, artsman, astroid, atonias, attains, diarist, diatoms, diorama, diosmin, disarms, distant, distort, domains, domatia, donairs, dormant, inroads, instars, intorts, iodisms, mantras, marinas, martian, martini, martins, mastoid, matador, matrons, midairs, mirador, missaid, mission, missort, mitosis, mordant, mortars, nimrods, notists, oarsman, ordains, radians, radiant, raisins, ramrods, randoms, ransoms, rations, rattons, roadman, simians, sinoids, sonatas, stamina, stardom, statins, station, statism, stomata, strains, straint, straits, strands, stratas, stridor, stroams, taoists, tartans, tartars, tostada, traitor, transit, tritoma, tsarina, tsarism, tsarist