breaker
breeder
buckaroo
caballero
cattleman
cavalier
cavalryman
chevalier
circus rider
cow keeper
cowboy
cowgirl
cowman
cowpuncher
dairy farmer
dairyman
equerry
equestrian
equestrienne
farrier
gaucho
grazier
groom
horse soldier
horseback rider
horsebacker
horseman
horseshoer
horsewoman
hostler
jockey
knight
mounted policeman
postboy
postilion
puncher
rancher
ranchero
ranchman
rider
roughrider
sheepman
stableboy
stableman
steeplechaser
stock raiser
stockbreeder
stockkeeper
stockman
tamer