noun
Refers to a round projectile fired from a cannon. Also used metaphorically or in sports contexts (e.g., a powerful shot or a dive).
海賊船がキャノンボールを撃ってきた。
The pirate ship fired a cannonball at us.
彼のサーブはまるでキャノンボールのようだ。
His serve is like a cannonball.
砲弾 is the native Japanese term for a cannonball or artillery shell, more formal and technical than the loanword キャノンボール.
Borrowed from English 'cannonball'.