This document discusses different types of nouns including proper nouns, common nouns, singular nouns, and plural nouns. Proper nouns always start with a capital letter and name specific people, places, things, or events. Common nouns are general names. Singular nouns name one person, place, thing, or event while plural nouns name more than one. The rules for making nouns plural usually involve adding -s or -es to the end of the word.