Trip and journey are practically synonymous. Trip is more colloquial and used to be a slang word 150 years ago. Examples: He made a trip to China. He made a journey to China. He has made several trips to Africa. He has made several journeys to Africa. Travel is more often a verb than a noun: He traveled/travelled around the world. As a noun it is usually in the plural: His travels took him to distant corners of the world. John Steinbect wrote a book called Travels With Charley. However, you can say a travel agency. Tour as a noun often refers to people, for example pop stars, traveling from city to city: The Rolling Stones have been on tour for two months now. You can use it as verb: They are touring Europe. in a short Tour: implies planned stops at several places. Travel: A general term meaning going away from your home to visit or to work, with intent to return.