Extramural and Outer

Extramural adjective - Carried on outside the bounds of an institution or community.

Outer and extramural are semantically related. in external topic. In some cases you can use "Outer" instead an adjective "Extramural".

Outer adjective - Situated on the outside or farther out.

Extramural and outer are semantically related. You can use "Extramural" instead an adjective "Outer".