The word cephalopods 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: 24
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (37 words)
alcopop, apposed, chapels, chapped, cheapos, chopped, clapped, clashed, clasped, clopped, copepod, dapples, deposal, epochal, hoppled, hopples, opcodes, opposed, papoose, peapods, placode, plashed, pleopod, poached, poaches, pooched, pooches, poodles, scalped, schlepp, scooped, shoaled, shopped, slapped, slopped, solaced, spooled