corresponding

Corresponding describes things that match, relate to, or are equivalent to each other in some systematic way.

Two lists have corresponding items when each item in one relates to an item in the other: Each employee has a corresponding ID number.

Corresponding angles in geometry occupy the same relative position.

The word often signals a parallel relationship or proportional change: Sales increased, with a corresponding rise in profits.

As a participle of correspond, it can also mean exchanging letters: corresponding with her pen pal.