A throng is a large group of people, usually gathered together in a crowded space. It is often used to describe a large gathering of people, such as a crowd at a concert or a protest. The term 'a throng' can also be used to describe a large number of people who are all doing the same thing, such as a throng of shoppers in a store. The word 'MANY' is an appropriate four-letter word to describe a throng.