The term 'SUFFIX WITH BARON' can be solved with two three-letter words: ESS and IAL. The suffix ESS is derived from the Old French word esse, meaning 'FEMALE'. It is used to denote a FEMALE version of a title or rank, such as baroness. The suffix IAL is derived from the Latin word ialis, meaning 'pertaining to'. It is used to denote a quality or characteristic associated with a title or rank, such as baronial.