het·er·on·y·mous 
(hĕt′ə-rŏnə-məs)
(hĕt′ə-rŏnə-məs)adj.
1. Being, relating to, or of the nature of a heteronym.
2. Being different names or terms but having correspondence or interrelationship, as mother and daughter.
[From Late Greek heterōnumos, from Greek, with a different denominator : Greek hetero-, hetero- + Greek onoma, name; see n-men- in the Appendix of Indo-European roots.]