An imposter is someone who poses as someone else. They might pretend to be someone famous or important, or they might pretend to be someone from a different country.
He was arrested for being an imposter, and he was wearing someone else's clothes.
The school's security guard is trying to catch the imposter who has been impersonating the principal.
noun
a person who makes deceitful pretenses
Synonyms:
1
You are the nuisance and the impostor.
2
The rhetoric of the impostor is identical with his.
3
Selby is elected, and the impostor assumes the office.
4
That's probably where the impostor got the idea.
5
The impostor revealed himself to the Illuminati and was killed.
6
Hi, thanks for the notice about the possible impostor.
7
Your argument above is with the existence of the impostor category.
8
Apparently Julian Crane believed that the impostor was the real Martin.
9
He manages to kill the impostor guards and discovers the theft.
10
The Prince awakens on an island after the impostor destroys the ship.