At collection of stamps is refered to as a stamp collection. They are frequently kept in albums. Philately is the name for the study and collection of stamps.
a collection of fish is called a school of fish
Collection of coins is called collection of cons only n there is no specific word for it. It is different from numismatics as numismatics is the systematic study of coins. Mere collection of coins cannot be called as numismatics.
Web page collection called a Website.
collection of information is called
The noun 'collection' is a collective noun in 'a collection of teddybears'.
the collection of events is called
Call the collection a harem.
A collection of weapons is an arsenal.
A bride's bottom drawer collection is called her providan.
A coin collection is called, well, a coin collection. The hobby of collecting coins is called numismatics.
A collection of thousands and millions of stars is called a galaxy.