Khyenpo or khenpo. An academic degree similar to a doctorate in theology, philosophy, and psychology. The term khenpo is a spiritual degree given in Tibetan Buddhism. In the Nyingma, Kagyu, and Sakya traditions, the title is awarded usually after a period of 13 years of intensive study after secondary school level studies, and is considered much like a spiritual Bachelor's. Similar titles of lower standing are De Nod Dzin Pa, and Shor Phon. In the Gelug tradition, the title khenpo refers to either a senior monk who ordains new monastics, or the abbot of a monastery. A comparable title in the Gelug lineage is Geshe.
In some sanghas a khenchen is a senior khenpo or a title applied to the most respected khenpos.
Example via www.ramdass.org: Nyoshul Khenpo Rinpoche