bowl

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

ball (formal dance event)

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

window

window / (regional, dialect, Etchū region) a deep gap in a mountain ridge (so called for the way the wind blows through, like a window)

to correspond to; to be equivalent to; to be equal to; to be considered as

disco ball, mirrorball

ball person

Synonym of 球技 (kyūgi, “ball game”)