The term "Australianist" refers to someone who is knowledgeable about the culture, history, and society of Australia. However, there are several other synonyms for this word. For instance, one could call an Australianist a "Australiaphile" or "Australophile," which both suggest a love for and interest in all things Australian. Another similar term is "Aussie expert," which highlights the individual's expertise in the subject matter. Additionally, a person who studies Australia or its inhabitants through a sociological lens may be referred to as an "Australiologist." Overall, these synonyms all describe someone who is passionate about and well-versed in Australian culture.