The word steradian 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: 11
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (30 words)
airdate, antsier, aridest, artisan, astride, atresia, destain, detains, detrain, disrate, instead, nastier, radians, radiant, radiate, restain, retains, retinas, sainted, sandier, sardine, stained, stainer, stander, tiaraed, tinders, tirades, tradein, trained, tsarina