The word cedarbirds 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: 18
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (31 words)
abiders, airbeds, ascribe, bidders, birders, bracers, braided, braider, braised, braiser, brasier, caddies, carbide, carders, carried, carries, crabier, decarbs, discard, rabider, radices, raiders, rebraid, scabrid, scarier, scarred, scribed, scriber, seabird, sidebar, sidecar