Lewis Short
dēbellātor (noun M) : debello
* A conqueror, subduer (rare; mostly poet.): ferarum, * Verg. A. 7, 651; * Stat. Th. 9, 545: Vespasianus Judaeorum debellator,Tert. Apol. 5: durus,Vulg. Sap. 18, 15.
Charlton T. Lewis, Charles Short, A Latin Dictionary