Collective nouns

A clump is a group of similar things, very close together and hard to separate. The picture is of a clump of yellow flowers.

A couple is two people together as partners or as a small group. It can also mean two things or items. You often hear it for friends or romantic partners, like a couple walking or a couple celebrating. You may see it in phrases such as "a couple of days" to mean a small number of days.

In Kenya, a group of rhinoceros is called a crash.

A crowd is a large group of people. Generally a crowd is a group of people with no particular order, jostling together. You can also use crowd as a verb, as in "to crowd in together" which means putting a lot of things in a small space.

A group of hares is called a drove. Sometimes they are called a husk.