Singular
common noun

Plural
common nouns

  1. A common noun is any noun that refers to a particular class or group or any particular person or thing; it is not written in capitals.
    Men, book and cat are examples of common nouns.
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Types of nouns (edit)

common noun - proper noun | concrete noun - abstract noun
count noun - uncountable noun (or mass noun)- collective noun
singular noun - plural noun | possessive noun