Identify the boldfaced noun as proper, common, abstract, concrete, compound, or collective. notice that each word fits more than one category. carton of milk proper common compound concrete abstract collective  carton is the bold word

Carton is:  

a common noun because it is a thing and common nouns include people, animals, places or things.a concrete noun because it describes something tangible, something you can touch, it not something abstract like an idea.

It is NOT:

a proper noun because it is not a name of a person or place.a compound noun because it doesn't consist of two or more words like, for example, basketball.an abstract noun because it doesn't describe an idea or feeling, such as happiness or freedom,  it describes something very concrete and specific. a collective noun because it doesn't describe a group of things like, for example, class or family.