Doctor
honorific title for a holder of a doctoral degree
Doctor of Theology
doctoral degree
honorary doctorate
honorary academic degree
Jubilee doctor
degree awarded to 50-year PhD or similar holders
doctor
academic degree in the Russian Empire
Doctor of Clinical Psychology
academic degree doctor
Doctor of Sciences
higher doctoral degree in the Soviet Union and post-Soviet states (also in other countries)
Doctor of Veterinary Medicine
doctorate in various countries
Doctor of Technology
Advanced level engineering degree, comparable to a Ph. D.