>I would have considered her an imposter

Funny you mention the word "imposter" I was only discussing it with a friend a couple of days ago (sad lives, you appreciate).

A friend was looking for a film called "The Impostors". She couldn't find it because she only searched on "imposters" and had never realised that there was an alternative spelling - is there a difference in usage or are the two interchangeable? Any views?