chemical science vs acetylise

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

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

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

chemical science (verb)	acetylise (verb)
	receive substitution of an acetyl group
	introduce an acetyl group into (a chemical compound)