The term 'AGILE' and its synonym 'NIMBLE' are often used to describe someone or something that is quick, light, and flexible. The term 'LITHE' is also a synonym for these two words, and it is defined as having a graceful and supple body. This term is often used to describe someone who is able to move quickly and easily. In summary, the term 'AGILE' and its synonyms 'NIMBLE' and 'LITHE' all refer to someone or something that is quick, light, and flexible.