The word that means a collection of related items is "set." In mathematics, a set is a well-defined collection of distinct objects, considered as an object in its own right. Sets are typically denoted by curly braces and can be used in various mathematical operations and analyses.
A collection or set of related items is often referred to as a category, cluster, or grouping.
Set.
The Mean
A fight or a disagreement. It can also mean a collection of items, like a row of chairs.
A collection of unprocessed items is known as data.
An assortment is simply defined as a collection of varying but related items. So yes. You can have an assortment of 2.
A collection or grouping of related items that share common characteristics or qualities.
A collection.
Do you mean "numismatic"? The study or collection of coins, tokens, and paper money and sometimes related objects.
A set.
collection jobs are certain jobs where collection items are exclusively looted.