Collective nouns refer to a group of people, animals, or things. Examples of collective nouns include:
* People: team, family, crowd, audience
* Animals: herd, flock, pack, school
* Things: fleet, bouquet, bunch, set
If you are looking for a collective noun to describe a group of barren things, you would need to use a more specific noun depending on the context. For example:
* A field of barren trees
* A collection of barren landscapes
* A group of barren planets