Ball

ку́ля

kúlja

(solid or hollow sphere)

м'яч

mʺjač

(object, generally spherical, used for playing games)

опу́ка

opúka

(object, generally spherical, used for playing games)

ядро́

jadró

(ballistics: a solid nonexplosive missile)

яйце́

jajcé

(testicle — see also testicle)

яє́чко

jajéčko

(testicle — see also testicle)