Canterwood is a motherboard chipset, officially known as the i875. It supports Dual Channel DDR SDRAM with Performance Acceleration Technology, 800MHz FSB, Communications Streaming Architecture, Hublink v1.5 and ICH5.
The Prescott is a processor, the successor to the current Northwood Pentium 4. It has an 800MHz FSB, 1MB of L2 cache and several other enhancements.