space platform vs space station

space platform and space station both are nouns.

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

As nouns, space platform and space station are synonyms defined as:

space platform and space station: a manned artificial satellite in a fixed orbit designed for scientific research

Other synonyms of space platform include space laboratory.

space platform (noun)	space station (noun)
a manned artificial satellite in a fixed orbit designed for scientific research	a manned artificial satellite in a fixed orbit designed for scientific research