球

baseball

the earth, the globe

sphere, counter for balls (in baseball)

ball, sphere, globe, orb, bead (of sweat, dew, etc.), drop, droplet, ball (in sports), pile (of noodles, etc.), bullet, bulb (i.e. a light bulb), lens (of glasses, etc.), bead (of an abacus), ball (i.e. a testicle), gem, jewel (esp. spherical; sometimes used figuratively), pearl, female entertainer (e.g. a geisha), person (when commenting on their nature), character, item, funds or person used as part of a plot, egg, coin, precious, beautiful, excellent

pitching, throwing a ball, bowling (in cricket), pitched ball

four balls, base on balls (baseball), a walk

baseball team

baseball stadium

fastball

(pitcher's) control (baseball)