space station vs space platform

space station and space platform both are nouns.

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

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

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

Other synonyms of space station include space laboratory.

space station (noun)	space platform (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