IPA: /ˈfaɪərˌbɔlər/
KK: /ˈfaɪərˌbɔlər/
A baseball player, specifically a pitcher, who throws the ball at very high speeds.
The fireballer struck out three batters in a row with his incredible speed.
The word 'fireballer' is formed from 'fire' (from Old English 'fyr', meaning flame or fire) and 'baller' (derived from 'ball', meaning a spherical object, with the suffix '-er' indicating a person who performs an action). A fireballer is someone who throws or delivers a fireball, often used in the context of sports or magic.
Think of someone who throws a 'ball' and combines it with 'fire' — that's why a fireballer is someone who delivers a fiery throw.
No commonly confused words.