Plurals.
Interesting plural words that aren't just the singular plus an 's'. And a few that are!
Burrs is the plural of burr.
Cacti is the plural of cactus.
Cattle is used to describe bovine animals, like cows.
Chicks is the plural of chick.
Children is the plural of child.
Clothes is another plural word for garments. You have one piece of clothing, but two clothes. Clothe is not the singular of clothes.
Elves is the plural of elf.
Eyes is the plural of eye.
Feet is the plural of foot. One foot, two feet. Most people have two feet, and most animals have four feet.
Flies is the plural of fly, or indicates that something is flying.
The cow in the picture has a lot of flies on its face.