space capsule vs space vehicle

space capsule and space vehicle both are nouns.

Word	Noun	Adjective	Verb	Adverb
space capsule	Yes	No	No	No
space vehicle	Yes	No	No	No

As nouns, space vehicle is a hypernym of space capsule; that is, space vehicle is a word with a broader meaning than space capsule:

space capsule: a spacecraft designed to transport people and support human life in outer space
space vehicle: a craft capable of traveling in outer space; technically, a satellite around the sun

Other hypernyms of space capsule include ballistic capsule, spacecraft.

space capsule (noun)	space vehicle (noun)
a spacecraft designed to transport people and support human life in outer space	a craft capable of traveling in outer space; technically, a satellite around the sun