A regular noun is a noun that forms its plural by adding an -s or an -es to the end of the noun.
An irregular noun is a noun that forms its plural in some other way.
Examples of regular nouns with their plurals:
- Apple, Apples
- boy, boys
- church, churches
- door, doors
- egg, eggs
- friend, friends
- goal, goals
- head, heads
- item, items
- joke, jokes
- knee, knees
- lunch, lunches
- mountain, mountains
- note, notes
- onion, onions
- pilot, pilots
- question, questions
- rose, roses
- snake, snakes
- trouble, troubles
- uncle, uncles
- vegetable, vegetables
- witch, witches
- x-ray, x-rays
- year, years
- zero, zeros
