Home Misspellings How to spell Australiasia? Australiasia or Australasia? Which one is correct? by hersey January 21, 2017 Reading Time: 0min, 7sc + - 0 Australiasia or Australasia Which one is correct? You can find the answer below. Incorrect Australiasia Correct Australasia You can find more information about Australasiahere. Rate this post Correct spelling of AustraliasiaHow do you spell Australiasia?