Bromo- is a prefix that comes from the Greek word "bromos" which means stench or bad odor. It is commonly found in chemistry and is related to the element bromine. Some synonyms that can be used include bromide, bromate, and brominate. Other words that start with the prefix bromo- include bromobenzene, bromochloromethane, and bromopropane. These words are all useful when discussing chemical compounds and elements. Overall, the prefix bromo- is an important component in the world of chemistry and helps to describe various substances and processes in the field.