* Common Noun: This refers to a general category of things, not a specific one. "Bridge" falls into this category because it represents any structure built to span a physical obstacle (like a river, road, or gap).
* Concrete Noun: This refers to something that is tangible and can be experienced through the senses. A bridge is a physical structure that can be seen, touched, and walked on, making it a concrete noun.
Therefore, "bridge" is both a common and a concrete noun.