General terms:
* Horse - This is the most common and straightforward term.
* Steed - A more poetic or archaic term for a horse, especially a warhorse.
* Equine - A scientific term for any member of the horse family.
Based on age and sex:
* Foal - A young horse of either sex.
* Colt - A young male horse.
* Filly - A young female horse.
* Mare - A female horse that has had at least one foal.
* Stallion - A mature male horse.
* Gelding - A male horse that has been castrated.
Based on breed:
* Thoroughbred
* Arabian
* Quarter Horse
* Appaloosa
* Mustang
Based on use:
* Racehorse
* Workhorse
* Show horse
* Pony - A small horse, often used for children.
Other terms:
* Dobbin - A workhorse, especially a draft horse.
* Nag - A tired or worn-out horse.
* Palomino - A horse with a golden coat and a white mane and tail.
Ultimately, the best way to call a horse depends on the context and your personal preference!