• A cacophony of noise
• A cacophony of sounds
• A cacophony of voices
• A camouflage net
• A can of whoop-ass
• A case of sciatics
• A cauldron of emotions
• A cautious approach
• A certain amount
• A chain letter
• A chain of events
• A chain reaction
• A chain store
• A challenging trek
• A chancy business
• A chancy proposition
• A change for the better
• A change for the worse
• A change of heart
• A change of pace