I have multiple lists. Every list include numbers - identificators of accounts. How properly shortly to write "account ids" or "accounts ids"?(Context - some data in list. Every account has one unique identificator). How properly shortly to write "accounts lists" or "account lists".

P.S. This question need to explain how to make short naming of entity for programming code.

  • Take a look at ell.stackexchange.com/questions/222064/… Does it answer your question? (attributive nouns are singular and lack determiners by default)
    – James K
    Apr 20, 2023 at 11:11
  • I don't understand what does it mean for this example. Can you get me explain for this question, need to use account or accounts? Apr 20, 2023 at 11:25
  • 'Attributive nouns are singular' - so account IDs (note capitalisation). Apr 20, 2023 at 11:42
  • Nouns used as adjective do not take an s: Account IDs.
    – Lambie
    Apr 20, 2023 at 11:52

1 Answer 1


In these cases, think of the label (such as "account" or "user") as an adjective, not a noun that is plural because there is more than one "thing".

As adjectives, the standard form is "account IDs" and "User IDs" rather than plural ("accounts IDs").

Also, the standard abbreviation for "Identification" is "ID", two capital letters, not "Id" or "id", which look too much like words that should be pronounced.

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