Quite a lot, when the word is “invasion”.
There are many historical examples of vigorous indigenous resistance to the British encroachment on their territories. The word “settlement”, with its connotations of peaceful occupation, misrepresents our history. The word “colonisation” is perhaps too abstract to adequately represent all the conflict that occurred.
But most European-descended Australians don’t like to think of our ancestors as invaders. Maybe we should get over that and be honest about it.