Equestrian
Part of speech: adjective
Definition: of horseback riding or horseback riders
Part of speech: noun
Definition: an equestrian person; one who rides on horseback
Horseman
Part of speech: noun
Definition: A man who rides a horse.A soldier on horseback.A man skilled in horsemanship.In British farming usage in former times, a man in charge of work horses.
Example sentence: A horseman's head is in Athens, and his body is in London: Poseidon's torso is separated between Greece and the U.K. This means that they cannot be celebrated and appreciated as a whole in the country they came from.