- another term for mass noun.
Countable nouns have both a singular and a plural form. Most nouns are countable, because they refer to things that can be counted. By contrast, a smaller number of nouns do not regularly have a plural form and are called uncountable. Examples include:mud snow butter In addition, many abstract nouns are normally uncountable. For exampleunhappiness dread darkness Many uncountable nouns can, however, also be used in the plural in certain circumstances. For example beer is usually uncountable, but can be a countable in sentences such as:beers of the world. See also countable and uncountable nouns.