Is cbETH the same as ETH?

Could you please clarify for me if cbETH and ETH are interchangeable terms, or do they refer to distinct entities within the realm of cryptocurrency? I've noticed the two mentioned in the same context and I'm trying to grasp the nuances between them. Is cbETH simply a variant or derivative of ETH, or does it possess unique properties or functions that distinguish it from the original ETH? Would it be accurate to say that cbETH is an enhanced or modified version of ETH, or is the relationship between them more complex than that? Your expert insight into this matter would be greatly appreciated.