space laboratory vs space station

space laboratory and space station both are nouns.

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

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

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

Other synonyms of space laboratory include space platform.

space laboratory (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