Is it Flier or Flyer? – What’s the Difference?
Any distinction between them is not widely borne out in any part of the English-speaking world.
Ax vs. axe
Ax in the U.S.; axe everywhere else.
Is It Center or Centre? – Meaning and Difference in Spelling
Center in the U.S.; centre everywhere else.
Specter vs. spectre
specter in the U.S.; spectre everywhere else.
Among vs. Amongst – Difference, Usage & Examples
They mean the same. Amongst is rare in American English and fairly common elsewhere.
Wagon vs. waggon
It is now spelled wagon everywhere.
Spoiled vs. spoilt
In North America, spoiled is both the past tense and the past participle, and spoilt is rare. Outside North America, the latter often appears as an adjective.
Burned vs. Burnt – Difference, Definition & Examples
Burned is favored in North America. Burnt is favored everywhere else.