booking
Word family
Synonym discussion
Sense: noun/1
For hotels, flights, restaurant tables, and similar services, booking and reservation are often the closest choices. Reservation can sound a little more formal, and it is especially common in American English. Appointment is different because it is used for a planned meeting with a person, such as a doctor or lawyer. Registration is different again: it means putting your name on a class, event, or system, not keeping a room or seat for later use. So you make a booking for a hotel room, an appointment with a dentist, and registration for a school camp. Those patterns help you choose the right word quickly.
Etymology
Booking comes from the verb book. In earlier English, a book was not only something to read but also a written record. From that idea, to book first meant writing a name or event into a list. Later, the word developed the modern uses of reserving rooms or tickets and arranging performers. The football meaning still shows the older image most clearly, because the referee writes the player's name down.