The word carcinosarcomas is playable in Words With Friends™, but 1 blank substituting for the letter 'c' is 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™ Plays In The Letters
Seven Letter Word Alert: (38 words)
acacias, airmass, caisson, carcass, cariama, carrion, casinos, cassoon, coronas, corsair, crimson, maniacs, maracas, marasca, marconi, marinas, maroons, mascara, masonic, microns, moronic, mosaics, narcoma, oarsman, omicron, oncosis, raccoon, racisms, racoons, rancors, ransoms, samaras, sarcasm, sarcoma, sariama, scoriac, scorias, somonis