A collection of weapons is an arsenal.
An 'Arsenal' Is a collection of weapons
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.
Units will coordinate with the LRS and/or the SFS for the collection and turn-in of issued weapons on R-Day for returning groups and individuals.
May be a number of terms that describe this; however, "weapons cache" seems to sum it up pretty well.
it is called a range of mountains
a collection of fish is called a school of fish
An armoury is a place where arms are made or kept, or a collection of weapons and materiel.
A collection of fish is called a school.
A collection of opinions is called a "consensus" or a "survey."
A collection of sayings is called a "proverb" or "aphorism."
A collection of pictures is called a gallery or an album.
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.