[He frowns and gives N a slightly exasperated look.]

Not the term, specifically, but the meaning -- insofar as Fairy is an 'alternate dimension', anyway. Alternate... I don't know... reality. I understand that my world and this one are not the same reality. It is odd that your home and this place are so similar, really. That is almost stranger than anything else... [He pauses, considering the implications of that.]

How can you be sure it is really so similar? Maybe it is very different in some way you haven't seen yet.