Lieu and Role

Lieu noun - The post or function properly or customarily occupied or served by another.

Role and lieu are semantically related. In some cases you can use "Role" instead a noun "Lieu".

Role noun - The action for which a person or thing is specially fitted or used or for which a thing exists.

Lieu and role are semantically related. Sometimes you can replace term "Lieu" with "Role", this nouns are similar.