Learn about common nouns , how they differ from proper nouns , and when they're capitalized. Explore examples and types with helpful images. Enhance your English grammar! Learn 100 examples of common nouns used in sentences to enhance your understanding and usage of everyday English vocabulary. Learn about common noun practical usage in English with engaging examples that clarify its role in sentences. A common noun is the generic name for a person, place, or thing, e.g., boy, town, lake, bridge. Common nouns contrast with proper nouns , which are the given names (or titles) we give to things, e.g., Peter, New York, Lake Superior, London Bridge. Common nouns are written with lowercase letters (unless they start a sentence), and proper nouns are written with uppercase letters.