If a word conforms to a special rule, I call it a North-America™ word. Here is a list of North-America™ and not North-America™ words:
And CSV version:
North-America™ Word,Not a North-America™ Word Colonial,Explorer Debate,Argue Imperial,Island Judicial,Judge Popular,Ordinary Superficial,Fake Universal,Earth Singular,Country Vulnerable,Sick
QUESTION: What is the rule to tell whether a word is a North-America™ word or not?
edit: Added the [Language] tag.