ball

A solid or hollow sphere, or roughly spherical mass.

"a ball of spittle; a fecal ball"

A round or ellipsoidal object.

(mildly, usually in the plural) A testicle.

To form or wind into a ball.

"to ball cotton"

To heat in a furnace and form into balls for rolling.

To have sexual intercourse with.

An appeal by the crowd for holding the ball against a tackled player. This is heard almost any time an opposition player is tackled, without regard to whether the rules about "prior opportunity" to dispose of the ball are fulfilled.