chemical science vs fluorocarbon

chemical science and fluorocarbon both are nouns.

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

chemical science (noun)	fluorocarbon (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	a halocarbon in which some hydrogen atoms have been replaced by fluorine; used in refrigerators and aerosols