The term 'KING of the Road' is a phrase that has been used to describe a HOBO, someone who travels from place to place without a permanent home. The crossword solutions for this term are 'HOBO' (4 letters) and 'highwayrex' (10 letters). The term 'HOBO' is often used to refer to a homeless person who travels from place to place in search of work or shelter. 'Highwayrex' is a combination of the words 'HIGHWAY' and 'REX, ' which is Latin for 'KING.' Together, these two words suggest a person who is a KING of the road, a HOBO who travels from place to place.