The word carburises 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: 17
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (33 words)
abscise, abusers, ascribe, bracers, braiser, braises, brasier, bruiser, bruises, bursars, carries, causers, crabier, crasser, cruiser, cruises, curries, cursers, raisers, rescrub, rubrics, saucers, saucier, scabies, scarers, scarier, scriber, scribes, sierras, subcase, subrace, sucrase, uricase