General names for people, places, or things
Specific names of people, places, or things (always capitalized)
John, London, Google, China
Names of things we can see, touch, hear, smell, or taste
apple, car, music, perfume
Names of ideas, feelings, or qualities
love, freedom, happiness, intelligence
Nouns that can be counted (singular or plural forms)
book → books, apple → apples
Nouns that cannot be counted individually
water, rice, information, air
Names of groups of people, animals, or things
team, family, class, herd
Nouns made up of two or more words
toothpaste, mother-in-law, bus stop