exacting vs microbiology

exacting is not a noun while microbiology is a noun.

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

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

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