A travel document is an essential item required when travelling. It is essential to have the document with you to provide proof of identity and citizenship. In general, there are a variety of terms that can be used to describe a travel document. Some examples include Passport, Visa, ID card, Green Card, Driving License, and Identity Document. Using synonyms is significant when it comes to communication and understanding different types of travel documents. It allows individuals to express themselves more comprehensively in the international world. Regardless of the term used, each travel document comes with its unique features and requirements that travelers need to adhere to.