conˈqueror noun

1. A person who conquers
2. A victor

conquest /kongˈkwest/ noun

1. The act of conquering
2. That which is conquered or acquired by physical or moral force
3. The act of gaining the affections of another
4. The person whose affections have been gained
5. Acquisition otherwise than by inheritance (old Scots law)

the Conqueror

William I of England (L conquestor)

the Conquest

The acquisition of the throne of England by William, Duke of Normandy, in 1066