coterminal

One of a number of terminals or airports which are interchangeable for the purposes of ticketing.

Coterminous: having the same scope or range, or meeting at the ends.

Differing only by a whole number of complete circles.

When you try to draw two coterminal angles on a circle, you will find that you only get one line.

Describing an object in a category, such that there is precisely one morphism that maps that object to every object in the category.

Simultaneously studying towards two or more separate degrees.

coterminal student