letters (plural noun): standard characters used in writing or printing
thousands (plural noun): 2 or more thousands
databases(plural noun): places where computers store information for ease of use
languages (plural noun): words, sounds, pronunciations, and methods of combining words used and understood by people
cities (plural noun): self governed permanently located communities of residences and businesses
dictionaries (plural noun): reference books containing alphabetically arranged words together with their definitions and usages
libraries (plural noun): collections of books, pamphlets, magazines, and reference books kept for reading, reference, or borrowing; buildings that lend books
flamingoes/ flamingos both ways are correct (plural noun): large, long-necked, tropical waiting birds, having very long legs, and pink or red plumage
studios (plural noun): places of work for artists, photographers, or other creative people
dominoes (plural noun): small rectangular blocks of wood or plastic with faces marked with dots
volcanoes (plural noun): mountains with a crater where lava comes out of
reefs (plural noun): chains of rocks, coral, or sand at or near the surface of the water
staffs (plural noun): people employed to assist in the day-to-day affairs of running a business, organization, or government
bookshelves (plural noun): open shelving areas used to display and store books
calves (plural noun): young offspring of the domestic cow