We don't have synonyms for australioid yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are australoid.
(n) :
Alternative form of Australoid. [(anthropology, historical) A historical grouping and racial classification which mainly includes aboriginal Australians but also Andamans, Melanesians, Micronesians, Negritos, New Guineans, and Veddas as well as sometimes Dravidians.]
(n) :
Alternative form of Australoid. [(anthropology, historical) A historical grouping and racial classification which mainly includes aboriginal Australians but also Andamans, Melanesians, Micronesians, Negritos, New Guineans, and Veddas as well as sometimes Dravidians.]