As nouns the difference between starter and appetizer
is that starter is someone who starts something while appetizer is (usually|in the plural) a small, light, and usually savory first course in a meal.
Does appetizer come before starter?
Modern French cuisine
In France, the modern meaning of "entrée" on a restaurant menu is the small course that precedes the main course in a three-course meal, i.e., the course which in British usage is often called the "starter" and in American usage the "appetizer".
Is appetizer and first course the same?
Appetizers are the first course served when seated at a table. An appetizer is meant to compliment an entrée and is generally a small-portioned first course of a multi-course meal. Appetizers are meant to whet the appetite before the following courses.