The term 'Swift of Foot' can be described by the word 'FLEET', which is a five-letter word. FLEET is an adjective that means moving quickly and lightly, often used to describe someone or something that is able to move with great speed. This term is often used to describe animals such as horses, deer, and birds, but it can also be used to describe people who are particularly fast runners. Swift of Foot is a phrase that is used to describe someone who is very fast and agile.