The word is spelt as you have in the question. As it happens, there is no difference between the American spelling and British spelling of the words.
The British spelling of skillful is skillful in a British accent
American spelling is 'recognized'. British spelling is 'recognised'.
The British English spelling of marvelous (astonishing; wonderful) is marvellous.
The British spelling is "squash" and the American spelling is also "squash." Both countries use the same spelling for this word.
The correct spelling for the word modernise is modernize.
The word blazing can be an adjective meaning very fast. It is also the present participle of the verb blaze.
centimetre (British spelling), centimeter (U.S. spelling)
You can use a program like myWriterTools to automatically change British spelling and word usage to American spelling and usage, or vice-versa.
No, the word blazing has two syllables. Blaz-ing.
The word "specialise" is the British English spelling of "specialize" (US spelling).
Spelt with an 's' not a 'z' as in revitalisation
Spelt with an 's' not a 'z' as in revitalisation