microbiology vs exacting

microbiology is a noun but exacting is not a noun.

Word	Noun	Adjective	Verb	Adverb
microbiology	Yes	No	No	No
exacting	No	Yes	No	No

microbiology (noun)	exacting (noun)
the branch of biology that studies microorganisms and their effects on humans

microbiology (adjective)	exacting (adjective)
	having complicated nutritional requirements; especially growing only in special artificial cultures
	requiring precise accuracy
	severe and unremitting in making demands