The word authorisers 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: 14
Highest Scoring Words With Friends™ Play In The Letters authorisers
:
Seven Letter Word Alert: (60 words)
arouser, arouses, arrests, artsier, ashiest, authors, earshot, estrous, hastier, hirsute, hoarier, hoarser, horsier, hosiers, hurries, hurters, oestrus, ousters, outhire, raisers, rashers, rashest, rasters, reroast, resorts, restirs, retours, rhetors, rioters, roaster, roister, rosiest, rosters, routers, rushers, rustier, satires, serious, sharers, shorter, shouter, sierras, soarers, sorters, sorties, sourest, sourish, starers, stories, stourie, suiters, suitors, tarries, toruses, tourers, trasher, trashes, trouser, urethra, urostea