They are two different words with different meanings. Lightning is the flashes in the sky you see in a storm. Lightening is the act of making something lighter, as in not as heavy or not as dark. So you see a flash of "lightning" and you can be "lightening" a load by removing some items that you are carrying.
Australia officially uses British-English.The correct spelling in British-English (and therefore in Australia) is centre.In American-English, the correct spelling is center. American-English is considered incorrect in British-English countries.
The British English spelling of "euthanized" is "euthanised"
Brasil
The correct spelling in British-English is favourite.The correct spelling in American-English is favorite.
That is the correct US spelling of "favorable" (the UK spelling is favourable).
Lightning rain would be translated to "ama no hotaru", translated literally as rain of lightning.
In British-English is is rumours.In American-English it is rumors.
Yes, the spelling of the word 'recognize' is American English. In British English, it is spelled as 'recognise'.
Focussed is the British English spelling. Focused is the US English spelling.
The correct spelling in British-English is behaviour.The correct spelling in American-English is behavior.
Traveled is the correct US English spelling. The British English spelling is "travelled".
Australia officially uses British-English.The correct spelling in British-English (and therefore in Australia) is centre.In American-English, the correct spelling is center. American-English is considered incorrect in British-English countries.
Vandalize (US English spelling) or Vandalise (British English spelling).
The US English spelling is "organizing". The British English spelling is "organising".
The US English spelling is "plagiarized". The British English spelling is "plagiarised".
The British English spelling of marvelous (astonishing; wonderful) is marvellous.
The spelling "centimetre" is the spelling in British and Commonwealth English, while the spelling "centimeter" is the spelling in American English.