abstract noun: a noun that names a feeling, idea, or quality that you cannot see, touch, hear, smell, or taste
Examples: generosity, leadership, success
base plural: a plural that is identical to the singular form of the noun; also called a zero plural
Examples: sheep, spacecraft, salmon
collective noun: a noun that refers to a group of people, animals, or things as a single unit
Examples: audience, herd, team
common noun: a noun that names any general person, place, thing, or idea
Examples: lion, ocean, painter, palace
concrete noun: a noun that names something you can see, touch, hear, smell, or taste
Examples: wildflower, coconut, music
foreign plural: an English plural that is formed by following the rules of the noun’s original language
Examples: antennae, foci, analyses
irregular plural: a plural that isn’t formed by adding -s or -es to the singular form of the noun
Examples: loaves, oxen, ellipses
mutant plural: a plural that is formed by changing the vowel in a word; also called an internal plural
Examples: women, teeth, mice
noun: a word that names a person, place, thing, or idea
Examples: freedom, Spain, astronaut
plural noun: a noun that names more than one person, place, thing, or idea
Examples: children, tractors, decorations, dreams
possessive noun: a noun that includes an apostrophe and shows that something belongs to someone or something
Examples: Haiyun’s notebook, the tigers' enclosure, Dickens’s novels
proper noun: a capitalized noun that names a specific person, place, thing, or idea
Examples: September, Maya Angelou, Nile River