carboxylic vs chemical science

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

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

carboxylic (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

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