chemical science vs acidic

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

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

chemical science (noun)	acidic (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)	acidic (adjective)
	being or containing an acid; of a solution having an excess of hydrogen atoms (having a pH of less than 7)
	being sour to the taste