Okay America lets try this again.

[b]Correct / Wrong[/b]

centre / center
fibre / fiber
litre / liter
theatre / theater

colour / color
flavour / flavor
humour / humor
labour / labor
neighbour / neighbor

analyse / analyze
breathalyse / breathalyze
paralyse / paralyze

travel / travel
travelled / traveled
travelling / traveling
traveller / traveler

defence / defense
licence / license
offence / offense
pretence / pretense

Before you argue... remember what the name of the language is. :D