thoroughly vs thorough

thoroughly is not an adjective while thorough is an adjective.

Word	Noun	Adjective	Verb	Adverb
thoroughly	No	No	No	Yes
thorough	No	Yes	No	No

thoroughly (adjective)	thorough (adjective)
	painstakingly careful and accurate
	performed comprehensively and completely; not superficial or partial
	without qualification; used informally as (often pejorative) intensifiers

thoroughly (adverb)	thorough (adverb)
in an exhaustive manner
completely and absolutely (`good' is sometimes used informally for `thoroughly')