London :: London (n.) The capital city of England.
Londoner :: Londoner (n.) A native or inhabitant of London.
Londonism :: Londonism (n.) A characteristic of Londoners; a mode of speaking peculiar to London.
Londonize :: Londonize (v. i.) To impart to (one) a manner or character like that which distinguishes Londoners.
Londonize :: Londonize (v. i.) To imitate the manner of the people of London.