Usage notes

• In English, mass nouns, such as information and money, generally have no plural form and are not used with the indefinite article or numbers (so “an information” and “seven money” are incorrect).
• Some mass nouns, such as whisky, can also be count nouns when they refer to a variety (“Scotch and Canadian whiskies”) or in informal usage to denote a serving (“please bring us two whiskies”).

See also

• collective noun
• noun of assemblage

• noun of multitude
• singulare tantum

• Appendix:Collective nouns
• Wikipedia’s list of collective nouns by collective term