fastidiously vs fastidious

fastidiously is not an adjective while fastidious is an adjective.

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

fastidiously (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

fastidiously (adverb)	fastidious (adverb)
in a fastidious manner
in a fastidious and painstaking manner