General terms:
* "Stier" is a common, more formal term used in some regions, particularly in the North of England and Scotland.
* "Ox" is used broadly for castrated male cattle, but sometimes specifically for older animals used for draught work.
Regional variations:
* "Bully" (Yorkshire)
* "Stot" (Northern England, Scotland)
* "Stirk" (Northern England, Scotland)
* "Runt" (Southern England, used specifically for a young steer)
* "Bovine" (archaic and less common)
It's important to note:
* "Bullock" and "steer" themselves are considered dialectal terms in some regions, especially in the US where "beef" is more commonly used.
* "Heifer" is the term for a young female cow, but can sometimes be used as a catch-all term for any young cattle, including steers.
The best way to know the most common word for a bullock or steer in a specific region is to ask someone from that area or do some research on their dialect.