acyclic vs chemical science

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

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

acyclic (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

acyclic (adjective)	chemical science (adjective)
not cyclic; especially having parts arranged in spirals rather than whorls
having an open chain structure