* Common nouns are words that refer to general, non-specific things. Examples include: dog, chair, city, happiness.
* "Warm and fuzzy" is a phrase that describes a feeling or emotion. It doesn't refer to a specific object or concept.
You could use "warm and fuzzy" to describe things, but it's not a noun itself. For example:
* "The movie had a warm and fuzzy feeling." (Here, "warm and fuzzy" describes the feeling of the movie)
Let me know if you'd like to explore other types of nouns or have any other questions about grammar!