"Rock lobster" is a common name for a species of lobster native to the waters off the coasts of North and South America. While this name is popular, there are other synonyms used to refer to this type of lobster. The most common synonym is "spiny lobster", which refers to the defensive spikes that cover their bodies. Another synonym is "crawfish lobster", which is often used in the Southern United States to describe the freshwater species of this lobster. Other names include "crayfish", "crab lobster", and "spotted lobster". These synonyms can help individuals better understand which species of lobster they are referring to, depending on their location or context.