bowling ball

ebonite

bowling (a game played by rolling a ball down an alley) / (cricket) bowling

cardboard (corrugated)

ball (sphere) / (basebal) ball (pitch that falls outside the strike zone)

bowl

Short for ボール紙 (bōru-gami): non-corrugated cardboard, pasteboard / Short for 段ボール (danbōru): corrugated cardboard

ball (formal dance event)

(baseball, softball) Synonym of 四球 (shikyū, “walk”)

ball person