sets

Example:She has a collection of vintage watches added to her collection of antique books.

Definition:A group or number of things of the same kind, either similar to each other or belonging together in a set.

Example:He studied the groups of diseases in the village to understand the causes of illness better.

Definition:A number of people or things that are in some way related or associated, especially by belonging to the same category or being used or done together.

Example:The assemblies of scientists debated the findings during the conference.

Definition:A gathering of a number of people or things, or a sum or total of a number of people or things.