astrobiology vs exobiology

astrobiology and exobiology both are nouns.

Word	Noun	Adjective	Verb	Adverb
astrobiology	Yes	No	No	No
exobiology	Yes	No	No	No

As nouns, astrobiology and exobiology are synonyms defined as:

astrobiology 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 astrobiology include space biology.

astrobiology (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