Extreme closeup of part of a dictionary entry for the phrase "mass noun"

Chicago Style Workout 71: Nouns

There’s more to nouns than people, places, and things. Some nouns are countable, and some are not. Most nouns are common, but some are proper. There are mass nouns and collective nouns, attributive nouns and nouns that can function as verbs. Some even take on adverbial roles.