What are some words that are spelled differently from Canadian and American?

Center, center. Color, colour. Theater, theatre. Honor, honour. Most of those of similar types, just for starters.

Well, if the Quebecois haven’t seceded yet, there’s the whole French dictionary.

The most obvious are color, honor (although on formal invitations we sometimes use the honour spelling) and harbor.

I’m pretty sure travelled and traveled? Judgement and judgment. Do Canadians use doughnut? America usually spells it donut. What about omelette? Omelet? I often spell it omelette, because that spelling make more sense to me.

In the US we call people from Canada Canadians. In Canada, they spell it Canadiens.

Neighbour and Neighbor is another one.
But there is so much more I thought it was just a few. https://en.wikipedia.org/wiki/American_and_British_English_spelling_differences

@zenvelo Les citoyens Canadiens in French, and Canadian citizens in English
Canadiens is the name of a hockey team also known as the Habs.

The Canadians tend to follow the Brits in their Euro-centric spellings. Is gray (US) spelled grey (UK) in Canada?

Grey and gray are both used synonymously in the US.

I think orthopædic is a departure from our orthopedic, in Canada and Britain.