Howdy Sofya, “travel” can be a verb OR a noun! For example: “Travel is expensive this time of year.” (noun) “I will travel for work next week.” (verb) This is true for many English words. Consider “walk”: “I think I will walk to the store.” (verb) “My walk to the store was uneventful.” (noun) This is true for words like: towel, pen, table, bed, book, slice, blanket, fall, floor, surprise, bag, head, film, cramp, pain, hand, push….the list is huge