anymore

Not necessarily. When "any more" a determinate adjective, it is written as two words in both usages. When it is used as an adverb meaning no longer, it is written as one word in American usage.

Would you like any more coffee? . . . is the form in both usages.

I don't go to Hampstead Heath any more . . . is British usage.

I don't go to the Jersey shore anymore . . . is American usage.

Writing it as two words would not be an error in American usage, but might look odd to an American.

"Anymore" (one word) used as an adverb to mean "to any further extent; any longer", would not be an error in British English either. In the last 50 years approximately, the one-word version has become dominant in US English, but older and, perhaps, widely-read Americans will be aware that it can be written as two words.

Thanks, Setanta and centrox.