Both are correct within its own country.
WikiAnswers uses American spelling as their standard.
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That may be so for the primary texts but a British contributor like me is likely to use British spellings (except of course for American proper nouns, e.g. "harbour" in general but "Pearl Harbor" for the name of the place).
Fulfil
That spelling is correct in British English. In American English, we would write 'orthopedic'.
The word "spelled" is the past tense of the verb to spell, so it is a valid word.The verb form "spelt" is used in British English, but rarely in the US.
British spelling: meagre
Savior is the American spelling. Saviour is the British spelling.
Both spellings "quarreling" and "quarrelling" are recognized by the dictionary - the spelling with a single L is the spelling most popular in American English, while the spelling with a double L is most popular in the British English.
That spelling is correct in British English. In American English, we would write 'orthopedic'.
The US spelling is hemorrhoids. The original UK spelling is haemorrhoids.
Recognizes is the correct US English spelling.The correct British English spelling is recognises.
You have spelled armour correctly if you want the British spelling. The American spelling is armor. There are many words that follow this pattern for British and American spelling, including color/colour, honor/honour, and flavor/flavour.
The word "spelled" is the past tense of the verb to spell, so it is a valid word.The verb form "spelt" is used in British English, but rarely in the US.
The British spelling of skillful is skillful in a British accent
The passive voice of the sentence "Fortune favours the bold" is "The bold are favored by fortune."
All the given words are the correct spelling in both British English and American English.
It is honor in US English and honour in British English.
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 English spelling of marvelous (astonishing; wonderful) is marvellous.
British spelling: meagre