chemical science vs carboxylic

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

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

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

chemical science (adjective)	carboxylic (adjective)
	relating to or containing the carboxyl group or carboxyl radical