microbiology vs fastidious

microbiology is a noun but fastidious is not a noun.

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

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

microbiology (adjective)	fastidious (adjective)
	giving careful attention to detail; hard to please; excessively concerned with cleanliness
	having complicated nutritional requirements; especially growing only in special artificial cultures