IPA: //ˈspiːdboʊt//
KK: /ˈspidˌboʊt/
A type of boat that is designed to move quickly on water, usually powered by a motor.
We took a thrilling ride on the speedboat along the coast.
Speedboat → It is formed from "speed" (from Old English *spēd*, meaning success or prosperity) and "boat" (from Old English *bāt*, meaning a small vessel for traveling on water). The word "speedboat" refers to a boat designed for fast travel on water.
Think of 'speed' meaning quickness and 'boat' as a vessel — a speedboat is a vessel designed for quick travel.
No commonly confused words.