This is called a "steeplechase".
A stable.
the same as a male - a jockey!
The rider is called a jockey.
Agricultural horses can be called a team, Race horses can also be called a field Regular horses are more commonly called a herd
If your racing and betting on each others horses its called Racing for Pinks!
They can be good race horses against other Morgans, but not against Thoroughbreds or Quarter horses.
Twenty horses can race at a time
I believe the person who rides the horses in the races is called a Jockey.
Racing horses? It's also called 12 furlongs, and is a common race distance.
Thoroughbred horses which originated in England are primarily bred for racing and are larger, heavier, taller and slimmer then a regular horse. They have a long and pointed head and face more health challenges then other horses.
The Kentucky Derby has 20 horses. But yeah, it's different from race to race. It's rare that there is more than 20 horses, but it happens. Usually 10-20, but sometimes only 2. But the Grand National has 40 horses.