rectification vs chemical science

rectification and chemical science both are nouns.

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

rectification (noun)	chemical science (noun)
the act of offering an improvement to replace a mistake; setting right	the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
determination of the length of a curve; finding a straight line equal in length to a given curve
the conversion of alternating current to direct current
(chemistry) the process of refinement or purification of a substance by distillation