space biology vs exobiology

space biology and exobiology both are nouns.

Word	Noun	Adjective	Verb	Adverb
space biology	Yes	No	No	No
exobiology	Yes	No	No	No

As nouns, space biology and exobiology are synonyms defined as:

space biology and exobiology: the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life

Other synonyms of space biology include astrobiology.

space biology (noun)	exobiology (noun)
the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life	the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life