chemical science vs reversibly

chemical science is a noun but reversibly is not a noun.

Word	Noun	Adjective	Verb	Adverb
chemical science	Yes	No	No	No
reversibly	No	No	No	Yes

chemical science (noun)	reversibly (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions

chemical science (adverb)	reversibly (adverb)
	in a reversible manner