IPA: /ˈspeɪsʃɪp/
KK: /ˈspeɪsˌʃɪp/
A vehicle designed for travel in outer space.
The astronauts boarded the spaceship for their mission to the International Space Station.
Spaceship → It is formed from "space" (from Latin *spatium*, meaning a continuous area or expanse) and "ship" (from Old English *scip*, meaning a vessel for traveling on water). The word "spaceship" refers to a vessel designed for travel in outer space, combining the concepts of a vessel and the expanse of space.
Think of a 'vessel' ('ship') designed for traveling through a vast 'area' ('space') — that's what a spaceship is.