We don't have synonyms for australias yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are Australia, Australian and australians.
(n) :
A country consisting of a main island, the island of Tasmania and other smaller islands, located in Oceania; historically, a collection of former colonies of the British Empire. Official name: Commonwealth of Australia. Capital: Canberra.
(n) :
(geology) A continent consisting of the land on the Australian tectonic plate, i.e. Australia, New Guinea and intervening islands.
(n) :
A country consisting of a main island, the island of Tasmania and other smaller islands, located in Oceania; historically, a collection of former colonies of the British Empire. Official name: Commonwealth of Australia. Capital: Canberra.
(n) :
(geology) A continent consisting of the land on the Australian tectonic plate, i.e. Australia, New Guinea and intervening islands.