horse (hoofed mammal, Equus ferus caballus, often used throughout history for riding and draft work)
knight (chess piece, often in the shape of a horse's head, that is moved two squares in one direction and one at right angles to that direction in a single move, leaping over any intervening pieces)
horse (piece of equipment with a body on two or four legs, approximately four feet high, sometimes (pommel horse) with two handles on top)
ticket salesperson
horse (children's toy resembling a horse)
horse-drawn carriage
horserider and horse
(obsolete) F (bad or failing grade)
(obsolete) lazy person
(obsolete) a type of siege engine similar to a battering ram
a type of torture device