"centre" is Australian English
"center" is American English
The Australian spelling is "metre".
"Centred" is an adjective, which means to be placed in the middle or to be self-confident and well balanced. This word is a chiefly british spelling of centered.
Metre is the Australian spelling of metre.
gaol is the correct Australian spelling, most Australians use the more modern spelling jail though.
That is the common spelling the way you did it. Americans just like to be different.
The Australian spelling for calendar (as in almanac) is..............calendar. A calender is a machine that smooths or glazes paper or cloth by pressing it between plates or passing it through rollers.
spelling
The US English spelling is "armor" (protective covering). The British, Canadian and Australian spelling is "armour".
That is the correct spelling of "dingo" (Australian wild dog).
Tasmanian devil is the correct spelling.
the spelling
Carrawang I think is the spelling