* Compound Adjectives: These are formed by combining two or more words to create a single adjective. They typically describe a specific quality or characteristic.
* Collective Nouns: These refer to a group of individuals or things.
In the case of "redhead," it's formed by combining "red" and "head" to describe someone with red hair.
Example:
* "The redhead girl sat in the corner." (Here, "redhead" acts as an adjective modifying "girl".)