Ball

공

gong

(solid or hollow sphere)

공

gong

(object, generally spherical, used for playing games)

구

gu

(solid or hollow sphere)

무도회

mudohoe

(formal dance)

볼

bol

(object, generally spherical, used for playing games)

볼

bol

(baseball: a pitch that falls outside the strike zone)

볼

bol

(anatomy: ball of a foot)

불

bul

(testicle — see also testicle)

불알

bural

(testicle — see also testicle)