The word "Rimmer" is commonly used as a last name, but it could also refer to a person who works at a shipyard, particularly someone who constructs or repairs the rudder of a ship. If you are looking for synonyms for this term, you might consider words like shipbuilder, marine mechanic, welder, or fabricator. Alternatively, if you are referring to the last name, some synonyms could include Rimar, Remer, Rumar, or Rimbaud. Regardless of the context, it's important to choose the right word that best reflects the meaning you intend to convey.