space platform vs orbiter

space platform and orbiter both are nouns.

Word	Noun	Adjective	Verb	Adverb
space platform	Yes	No	No	No
orbiter	Yes	No	No	No

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

space platform: a manned artificial satellite in a fixed orbit designed for scientific research
orbiter: man-made equipment that orbits around the earth or the moon

Other hypernyms of space platform include artificial satellite, satellite.

space platform (noun)	orbiter (noun)
a manned artificial satellite in a fixed orbit designed for scientific research	man-made equipment that orbits around the earth or the moon