Letters that stand for parts of a name are called initials.
In Kurdish it is called Nama Nus.
A contraction
Vent
A novel written as letters (epistles) is called an epistolary novel.
The word "subless" can be formed by unjumbling the letters in the word "bssurels."
Unjumbling letters to form words is a favorite pastime of many. The process involves looking for patterns or possible letter combinations. It can be a trial and error process. This letters can form the words true and stiff.
Ogre
A set of letters is normally called an alphabet.
It's called fan mail fan letters
A snow vehicle with the letters kid in it is called a Skidoo
Scrabble letters are called tiles. The part that holds each player's letters is called a rack.
Letters can be sent to an address.
If you're referring to St. Paul's letters in the New Testament, they are called epistles.
If the letters represent unknowns they are usually called variable.
A group of postal letters is called a mail or a batch of mail.
The letters in music are called the musical alphabet. The letters represent notes, and there are 12 of them. Natural notes are given the letters A through G. The other notes are in between natural notes and they are called sharps and flats.