acetylise vs chemical science

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

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

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

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