The number 9 enclosed in a circle, used in enumerating lists.

(fandom slang) The Touhou character Cirno, known affectionately as an idiot.

cardboard (corrugated)

(informal) nine / (baseball) baseball team

(rare) no

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)

Kyūjitai form of 直撃 (“direct hit”)