Bilateral
Part of speech: adjective
Definition: having two sides involving both sides equally binding on both parties to an agreement having bilateral symmetry involving descent or ascent regardless of sex and side of the family
Example sentence: I want to initiate a bilateral agenda that helps Mexico and the U.S. together compete with the world better, especially with the economies of Asia and the Pacific.
Reciprocal
Part of speech: noun
Definition: Of a number, the number obtained by dividing 1 by the given number; the result of exchanging the numerator and the denominator of a fraction.
Example sentence: Amity itself can only be maintained by reciprocal respect, and true friends are punctilious equals.