馬【うま】
horse, horse racing, promoted bishop, knight (court card in mekuri karuta and unsun karuta)
競馬【けいば】
horse racing
騎馬【きば】
horse riding, horseback riding, horseback rider
馬術【ばじゅつ】
horsemanship, equestrian art, (art of) riding
馬力【ばりき】
horsepower, hp, energy, vitality, vigour, strength, horse-drawn cart
竹馬【たけうま】
stilts (for walking), hobby horse
馬鹿【ばか】
idiot, moron, fool, trivial matter, folly, absurdity, stupid, foolish, dull, absurd, ridiculous, fervent enthusiast, nut, person singularly obsessed with something, Mactra chinensis (species of trough shell)