Which word in the following list is different from the others, and why?

CAT
HORN
TREAT
BACON
SETTER
BEETLE
MUFFIN
LAWYER
ROULETTE

Answer:

LAWYER - All the other words can be associated with a country, but LAWYER is associated with a city:

PERSIAN CAT
FRENCH HORN
DUTCH TREAT
CANADIAN BACON
IRISH SETTER
JAPANESE BEETLE
ENGLISH MUFFIN 
PHILADELPHIA LAWYER
RUSSIAN ROULETTER