is a word used to describe a something that cannot be counted

does not have a plural form

is also called a non-count noun, uncountable noun, or a mass noun

is similar to a collective noun and the opposite of a countable noun

advice, afterthought, anger, art, beauty, behavior, business, childhood, confidence, courage, crime, democracy, education, energy, enjoyment, entertainment, freedom, friendship, fun, grammar, hate, hatred, happiness, health, help, history, homework, honesty, importance, information, insurance, intelligence, interest, justice, knowledge, laughter, law, life, love, luck, music, news, noise, opportunity, patience, peace, permission, politics, practice, pride, progress, proof, responsibility, schizophrenia, secrecy, slang, sleep, time, traffic, travel, trouble, truth, unemployment, violence, vocabulary, wealth, work

baggage, cash, change (money), clothing, equipment, food, fruit, furniture, garbage, homework, jewelry, junk, luggage, machinery, mail, make-up, money, postage, silverware, stuff, traffic, trash, vocabulary

beer, coffee, cream, gasoline, honey, juice, ketchup, lotion, milk, oil, salad dressing, sauce, shampoo, soda, soup, syrup, tea, vinegar, water, wine

bacon, beef, bread, broccoli, butter, cabbage, cake, candy, cereal, celery, chalk, cheese, chicken (meat), chocolate, corn, cotton, detergent, dirt, dust, film, fish, flour, food, garlic, glass, gold, grass, hair, hamburger (meat), ice, ice cream, lettuce, meat, paper, pasta, pepper, pizza, pork, rice, salt, sand, seafood, silver, spaghetti, spinach, soap, sugar, toothpaste, wheat, wood, yogurt

air, carbon dioxide, cold, darkness, electricity, fire, fog, heat, humidity, light, lightning, mist, oxygen, rain, scenery, smog, smoke, snow, sunshine, temperature, thunder, warmth, weather, wind

athletics, badminton, baseball, basketball, billiards, bowling, boxing, camping, cards, chess, conversation, cooking, cycling, dancing, darts (game), driving, football, golf, gymnastics, hiking, jogging, poker, reading, running, sailing, singing, soccer, shopping, slating, skiing, studying swimming, surfing, tennis, traveling, volleyball, walking, wrestling

accounting, art, astronomy, biology, business, chemistry, civics, economics, engineering, geography, geometry, history, journalism, linguistics, literature, mathematics, music, nutrition, physics, psychology, science, sociology, speech, writing